scholarly journals Kin and multilevel selection in social evolution: a never-ending controversy?

F1000Research ◽  
2016 ◽  
Vol 5 ◽  
pp. 776 ◽  
Author(s):  
Jos Kramer ◽  
Joël Meunier
Keyword(s):  
Kin Selection ◽  
Group Selection ◽  
Evolutionary Biology ◽  
Social Evolution ◽  
Selection Process ◽  
Structured Populations ◽  
Multilevel Selection ◽  
Current Debate ◽  
The Relationship ◽  
Shed Light

Kin selection and multilevel selection are two major frameworks in evolutionary biology that aim at explaining the evolution of social behaviors. However, the relationship between these two theories has been plagued by controversy for almost half a century and debates about their relevance and usefulness in explaining social evolution seem to rekindle at regular intervals. Here, we first provide a concise introduction into the kin selection and multilevel selection theories and shed light onto the roots of the controversy surrounding them. We then review two major aspects of the current debate: the presumed formal equivalency of the two theories and the question whether group selection can lead to group adaptation. We conclude by arguing that the two theories can offer complementary approaches to the study of social evolution: kin selection approaches usually focus on the identification of optimal phenotypes and thus on the endresult of a selection process, whereas multilevel selection approaches focus on the ongoing selection process itself. The two theories thus provide different perspectives that might be fruitfully combined to promote our understanding of the evolution in group-structured populations.

4. Levels of selection

2019 ◽  
pp. 45-62
Author(s):  
Samir Okasha
Keyword(s):  
Kin Selection ◽  
Group Selection ◽  
Evolutionary Biology ◽  
Levels Of Selection ◽  
Major Transitions ◽  
Individual Level ◽  
Or Groups ◽  
The Subject ◽  
The Individual ◽  
Major Transitions In Evolution

‘Levels of selection’ examines the levels-of-selection question, which asks whether natural selection acts on individuals, genes, or groups. This question is one of the most fundamental in evolutionary biology, and the subject of much controversy. Traditionally, biologists have mostly been concerned with selection and adaptation at the individual level. But, in theory, there are other possibilities, including selection on sub-individual units such as genes and cells, and on supra-individual units such as groups and colonies. Group selection, altruistic behaviour, kin selection, the gene-centric view of evolution, and the major transitions in evolution are all discussed.

scholarly journals The validity and value of inclusive fitness theory

2011 ◽  
Vol 278 (1723) ◽  
pp. 3313-3320 ◽  
Author(s):  
Andrew F. G. Bourke
Keyword(s):  
Kin Selection ◽  
Evolutionary Biology ◽  
Social Evolution ◽  
Inclusive Fitness ◽  
Evidence Base ◽  
Alternative Theory ◽  
Selection Theory ◽  
Inclusive Fitness Theory ◽  
Evolution Of Eusociality ◽  
Natural Selection Theory

Social evolution is a central topic in evolutionary biology, with the evolution of eusociality (societies with altruistic, non-reproductive helpers) representing a long-standing evolutionary conundrum. Recent critiques have questioned the validity of the leading theory for explaining social evolution and eusociality, namely inclusive fitness (kin selection) theory. I review recent and past literature to argue that these critiques do not succeed. Inclusive fitness theory has added fundamental insights to natural selection theory. These are the realization that selection on a gene for social behaviour depends on its effects on co-bearers, the explanation of social behaviours as unalike as altruism and selfishness using the same underlying parameters, and the explanation of within-group conflict in terms of non-coinciding inclusive fitness optima. A proposed alternative theory for eusocial evolution assumes mistakenly that workers' interests are subordinate to the queen's, contains no new elements and fails to make novel predictions. The haplodiploidy hypothesis has yet to be rigorously tested and positive relatedness within diploid eusocial societies supports inclusive fitness theory. The theory has made unique, falsifiable predictions that have been confirmed, and its evidence base is extensive and robust. Hence, inclusive fitness theory deserves to keep its position as the leading theory for social evolution.

scholarly journals Demography, class-structure and kin selection in continuous-time models

2018 ◽  
Author(s):  
António M. M. Rodrigues
Keyword(s):  
Continuous Time ◽  
Kin Selection ◽  
Social Evolution ◽  
Inclusive Fitness ◽  
Structured Populations ◽  
Class Structure ◽  
Simple Extension ◽  
Individual Level ◽  
Parental Quality ◽  
Wide Range

AbstractThe Wright-Fisher infinite island model and the neighbour-modulated approach to kin selection have enabled major advances in the understanding of social evolution in a demographic context. Due to structural assumptions, however, some important evolutionary problems are difficult to solve within the Wright-Fisher discrete-time framework. Although these major constraints are relaxed in the Moran continuous-time framework, a formal treatment of the mathematics of kin selection in continuous-time class-structured populations is still lacking. Here, I employ the neighbour-modulated approach to formalise key features of the kin selection theory in continuous-time infinite-island models. Next, I derive a general form of Hamilton’s rule to enable an inclusive fitness interpretation of social behaviours. I consider class-structure at the group and individual level, and I focus on conditional and unconditional phenotypes. I illustrate how the general theory can be applied to solve a wide range of biological problems. Finally, I show how a simple extension of the framework allows for the study of problems pertaining to the transmission of parental quality. I show that while inheritance of parental quality may either promote or inhibit selection on conditional helping behaviours, unconditional behaviours are invariant with respect to the fidelity of inheritance.

Kin Selection and Group Selection

2017 ◽  
Author(s):  
Jonathan Birch
Keyword(s):  
Structural Properties ◽  
Kin Selection ◽  
Group Selection ◽  
Social Groups ◽  
Structured Populations ◽  
Spatial Metaphor ◽  
Selection Processes ◽  
Equivalent Conditions

In group-structured populations in which some other assumptions are satisfied, kin and group selectionist methods provide formally equivalent conditions for change. However, this only shows an equivalence between two statistical methodologies, and this is compatible with there being a real, causal distinction between kin and group selection processes. This chapter pursues a Hamilton-inspired, population-centred approach to drawing that distinction, on which the differences between kin and group selection are differences of degree in the structural properties of populations. The relevant properties are K, the overall degree to which genealogical kin interact differentially, and G, the overall degree to which the population contains stable, internally integrated, and externally isolated social groups. A spatial metaphor (‘K-G space’) provides a useful framework for thinking about these differences.

Intra- and inter-regional expansion: a nonlinear model

2019 ◽  
Vol 57 (7) ◽  
pp. 1554-1566
Author(s):  
Hua Zhang ◽  
Gongming Qian ◽  
Lee Li ◽  
Zhengming Qian
Keyword(s):  
Firm Performance ◽  
Design Methodology ◽  
Secondary Data ◽  
Current Debate ◽  
Content Type ◽  
Managerial Implications ◽  
Using Data ◽  
Regional Diversification ◽  
The Relationship ◽  
Shed Light

Purpose The purpose of this paper is to differentiate between intra- and inter-regional diversification and explore how each affects firm performance. Existing studies show that both intra- and inter-regional expansion provide benefits and incur costs but the findings are mixed. This study aims to explain the mixed findings. Design/methodology/approach This study uses secondary data and quantitative methodologies to test hypotheses. Findings Using data from 663 Canadian firms over a six-year period (2006–2011), the authors find that the relationship between firm performance and the depth and width of intra-regional expansion is nonlinear. The authors also find a sigmoid-shaped relationship between firm performance and inter-regional diversification, i.e., performance initially increases with home regional diversification, decreases with bi-regional diversification and finally increases again with multi-regional diversification. Originality/value The findings of this study shed light on the current debate on the merits of inter- and intra-regional diversification and have important theoretical and managerial implications.

Revisiting the ‘Darwin–Marx correspondence’: Multiple discovery and the rhetoric of priority

2021 ◽  
pp. 095269512110192
Author(s):  
Joel Barnes
Keyword(s):  
Social Sciences ◽  
Evolutionary Biology ◽  
Karl Marx ◽  
Charles Darwin ◽  
Natural Sciences ◽  
History Of Ideas ◽  
Research Infrastructures ◽  
History Of ◽  
The Relationship ◽  
Shed Light

Between the 1930s and the mid 1970s, it was commonly believed that in 1880 Karl Marx had proposed to dedicate to Charles Darwin a volume or translation of Capital but that Darwin had refused. The detail was often interpreted by scholars as having larger significance for the question of the relationship between Darwinian evolutionary biology and Marxist political economy. In 1973–4, two scholars working independently—Lewis Feuer, professor of sociology at Toronto, and Margaret Fay, a graduate student at Berkeley—determined simultaneously that the traditional story of the proposed dedication was untrue, being based on a long-standing misinterpretation of the relevant correspondence. Between the two, and among several other scholars who became their respective allies, there developed a contest of authority and priority over the discovery. From 1975 to 1982, the controversy generated a considerable volume of spilled ink in both scholarly and popular publications. Drawing on previously unexamined archival resources, this article revisits the ‘case’ of the so-called ‘Darwin–Marx correspondence’ as an instance of the phenomenon of ‘multiple discovery’. A familiar occurrence in the natural sciences, multiple discovery is rarer in the humanities and social sciences. The present case of a priority dispute in the history of ideas followed patterns familiar from such disputes in the natural sciences, while also diverging from them in ways that shed light on the significance of disciplinary norms and research infrastructures.

scholarly journals Identifying causes of social evolution: The Price approach, contextual analysis, and multilevel selection

2020 ◽  
Author(s):  
Christoph Thies ◽  
Richard A. Watson
Keyword(s):  
Kin Selection ◽  
Group Selection ◽  
Causal Structure ◽  
Multilevel Selection ◽  
Contextual Analysis ◽  
Price Equation ◽  
Selection Theory ◽  
Individual Fitness ◽  
Multilevel Selection Theory ◽  
The Individual

AbstractKin selection theory and multilevel selection theory are different approaches to explaining the evolution of social traits. The latter claims that it is useful to regard selection as a process that can occur on multiple levels of organisation such as the level of individuals and the level of groups. This is reflected in a decomposition of fitness into an individual component and a group component. However, the two major statistical tools to determine the coefficients of such a decomposition, the multilevel Price equation and contextual analysis, are inconsistent and may disagree on whether group selection is present. Here we show that the reason for the discrepancies is that underlying the multilevel Price equation and contextual analysis are two nonequivalent causal models for the generation of individual fitness effects (thus leaving different ‘remainders’ explained by group effects). While the multilevel Price equation assumes that the individual effect of a trait determines an individual’s relative success within a group, contextual analysis posits that the individual effect is context-independent. Since these different assumptions reflect claims about the causal structure of the system, the correct approach cannot be determined on general theoretical or statistical grounds but must be identified by experimental intervention. We outline interventions that reveal the underlying causal structure and thus facilitate choosing the appropriate approach. We note that the reductionist viewpoint of kin selection theory with its focus on the individual is immune to such inconsistency because it does not address causal structure with respect to levels of organisation. In contrast, our analysis of the two approaches to measuring group selection demonstrates that multilevel selection theory adds meaningful (falsifiable) causal structure to explain the sources of individual fitness and thereby constitutes a proper refinement of kin selection theory.

scholarly journals The evolution of multicellular complexity: the role of relatedness and environmental constraints

2019 ◽  
Author(s):  
RM Fisher ◽  
JZ Shik ◽  
JJ Boomsma
Keyword(s):  
Physical Environment ◽  
Evolutionary Biology ◽  
Social Evolution ◽  
Group Formation ◽  
Environmental Constraints ◽  
Evolutionary Transitions ◽  
Slime Moulds ◽  
The Many ◽  
Shed Light

AbstractA major challenge in evolutionary biology has been to explain the variation in multicellularity across the many independently evolved multicellular lineages, from slime moulds to humans. Social evolution theory has highlighted the key role of relatedness in determining multicellular complexity and obligateness, however there is a need to extend this to a broader perspective incorporating the role of the environment. In this paper, we formally test Bonner’s 1998 hypothesis that the environment is crucial in determining the course of multicellular evolution, with aggregative multicellularity evolving more frequently on land and clonal multicellularity more frequently in water. Using a combination of scaling theory and phylogenetic comparative analyses, we describe multicellular organisational complexity across 139 species spanning 14 independent transitions to multicellularity and investigate the role of the environment in determining multicellular group formation and in imposing constraints on multicellular evolution. Our results, showing that the physical environment has impacted the way in which multicellular groups form, could shed light on the role of the environment for other major evolutionary transitions.

Language, Politics and Society in the Middle East

2018 ◽  
Author(s):  
Abeer AlNajjar
Keyword(s):  
Middle East ◽  
Linguistic Landscape ◽  
Language Politics ◽  
Road Signs ◽  
Grassroots Initiatives ◽  
Language And Politics ◽  
Development Of Language ◽  
Core Questions ◽  
The Relationship ◽  
Shed Light

This book aims to shed light on core questions relating to language and society, language and conflict, and language and politics, in relation to a changing Middle East. While the book focuses on Arabic, it goes way beyond a purely linguistic analysis by bringing to the fore a set of pressing questions about the relationship between Arabic and society. For example, it touches on the development of language policy via an examination of administrative mandates (top-down) in contrast to grassroots initiatives (bottom-up); the deeper layers of the linguistic landscape that highlight the connection between politics, conflict, identity, road signs and street names; Arabic studies and Arabic identity and the myriad ways countries deal simultaneously with globalisation while also seeking to strengthen local and national identity, and more.

Considering Others’ Mental States Causally Increases Feelings of Social Bonding and Information Sharing

2019 ◽  
Author(s):  
Elisa Baek ◽  
Diana Tamir ◽  
Emily B. Falk
Keyword(s):  
Social Behavior ◽  
Information Sharing ◽  
Mental States ◽  
Social Bonding ◽  
Health News ◽  
Brain Behavior ◽  
The Relationship ◽  
Share Information ◽  
Shed Light ◽  
Mentalizing System

Information sharing is a ubiquitous social behavior. What causes people to share? Mentalizing, or considering the mental states of other people, has been theorized to play a central role in information sharing, with higher activity in the brain’s mentalizing system associated with increased likelihood to share information. In line with this theory, we present novel evidence that mentalizing causally increases information sharing. In three pre-registered studies (n = 400, 840, and 3500 participants), participants who were instructed to consider the mental states of potential information receivers indicated higher likelihood to share health news compared to a control condition where they were asked to reflect on the content of the article. Certain kinds of mentalizing were particularly effective; in particular, considering receivers’ emotional and positive mental states, led to the greatest increase in likelihood to share. The relationship between mentalizing and sharing was mediated by feelings of closeness with potential receivers. Mentalizing increased feelings of connectedness to potential receivers, and in turn, increased likelihood of information sharing. Considering receivers’ emotional, positive, and inward-focused mental states was most effective at driving participants to feel closer with potential receivers and increase sharing. Data provide evidence for a causal relationship between mentalizing and information sharing and provide insight about the mechanism linking mentalizing and sharing. Taken together, these results advance theories of information sharing and shed light on previously observed brain-behavior relationships.

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