scholarly journals The transition to foraging for dense and predictable resources and its impact on the evolution of modern humans

2016 ◽  
Vol 371 (1698) ◽  
pp. 20150239 ◽  
Author(s):  
Curtis W. Marean
Keyword(s):  
South Africa ◽  
Human Evolution ◽  
Cultural Evolution ◽  
Food Production ◽  
Modern Humans ◽  
Major Transitions ◽  
Rivers And Lakes ◽  
Broad Spectrum Revolution ◽  
Selection For ◽  
Empirical Record

Scientists have identified a series of milestones in the evolution of the human food quest that are anticipated to have had far-reaching impacts on biological, behavioural and cultural evolution: the inclusion of substantial portions of meat, the broad spectrum revolution and the transition to food production. The foraging shift to dense and predictable resources is another key milestone that had consequential impacts on the later part of human evolution. The theory of economic defendability predicts that this shift had an important consequence—elevated levels of intergroup territoriality and conflict. In this paper, this theory is integrated with a well-established general theory of hunter–gatherer adaptations and is used to make predictions for the sequence of appearance of several evolved traits of modern humans. The distribution of dense and predictable resources in Africa is reviewed and found to occur only in aquatic contexts (coasts, rivers and lakes). The palaeoanthropological empirical record contains recurrent evidence for a shift to the exploitation of dense and predictable resources by 110 000 years ago, and the first known occurrence is in a marine coastal context in South Africa. Some theory predicts that this elevated conflict would have provided the conditions for selection for the hyperprosocial behaviours unique to modern humans. This article is part of the themed issue ‘Major transitions in human evolution’.

A Story of Us

2021 ◽  
Author(s):  
Lesley Newson ◽  
Peter Richerson
Keyword(s):  
Human Evolution ◽  
Cultural Evolution ◽  
Ice Age ◽  
Modern Humans ◽  
Evolutionary Path ◽  
Modern Times ◽  
Science Book ◽  
Early Humans ◽  
Last Ice Age ◽  
New Evidence

It’s time for a new story of our origins. One reason is that there a great deal of new evidence about what humans are like and the conditions that shaped human evolution. Another is that the thinking on human evolution has shifted. Evolutionists recognize that humans are very different from other animals, and they have been working to explain the different evolutionary path that humans took. There are still many gaps in the story, but this book describes seven points in our ancestors’ tale and explains the evidence behind these descriptions. The story begins seven million years ago, with the life of our ape ancestors, which were also the ancestors of today’s chimpanzees and bonobos. The second point is three million years ago with an ape that walked upright and lived outside the forest. Then follows a description of the life of early humans who lived one and a half million years ago. At the fourth point, 100,000 years ago, humans lived in Africa who were physically very similar to modern humans. The fifth is 30,000 years ago, during the last ice age, when our ancestors had evolved more complex cultures. The sixth is the period of accelerating cultural evolution that began as the planet started to recover from this ice age. Finally, beginning in the 1700s, there is the transformational period we are in now, which we call “modern times.” The style of this book is unusual for a science book because it has narrative sections that illustrate the lives of our ancestors and the problems they faced.

Domestication is not an ancient moment of selection for prosociality: Insights from dogs and modern humans

2021 ◽  
pp. 146960532110554
Author(s):  
Robert J. Losey
Keyword(s):  
Human Evolution ◽  
Modern Humans ◽  
Past Event ◽  
Multiple Generations ◽  
Ongoing Process ◽  
Entry Points ◽  
Human Intention ◽  
Selection For ◽  
Material Things

Domestication is often portrayed as a long-past event, at times even in archaeological literature. The term domestication is also now applied to other processes, including human evolution. In such contexts, domestication means selection for friendliness or prosociality and the bodily results of such selective choices. Both such perspectives are misleading. Using dogs and modern humans as entry points, this paper explores why conceiving of domestication as a threshold event consisting of selection for prosociality is both incomplete and inaccurate. Domestication is an ongoing process, not a moment or an achievement. Selection in breeding, including for prosociality, is a part of many domestication histories, but it alone does not sustain this process over multiple generations. Further, much selection in domestication has little to do with human intention. Care, taming, commensalism, material things, and places are critical in carrying domestic relationships forward.

scholarly journals The Encultured Primate: Thresholds and Transitions in Hominin Cultural Evolution

Philosophies ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 6
Author(s):  
Chris Buskes
Keyword(s):  
Human Evolution ◽  
Cultural Evolution ◽  
Animal Species ◽  
Stone Tools ◽  
Human Beings ◽  
Cumulative Culture ◽  
Cultural Traditions ◽  
Major Transitions ◽  
Extant Species ◽  
Shed Light

This article tries to shed light on the mystery of human culture. Human beings are the only extant species with cumulative, evolving cultures. Many animal species do have cultural traditions in the form of socially transmitted practices but they typically lack cumulative culture. Why is that? This discrepancy between humans and animals is even more puzzling if one realizes that culture seems highly advantageous. Thanks to their accumulated knowledge and techniques our early ancestors were able to leave their cradle in Africa and swarm out across the planet, thereby adjusting themselves to a whole range of new environments. Without culture this would have been impossible. So we may ask once again: if cumulative culture is so useful, why don’t other animals have it? In order to explain this mystery I won’t appeal to the major transitions in human evolution—like walking upright, crafting stone tools and controlling fire, etc.,—because that would be question begging. Instead I try to unearth the mechanisms that caused those evolutionary turning points to occur in the first place. It seems that unlike other animals, humans are predisposed to efficiently acquire, store and transmit cultural information in such ways that our cultures can genuinely evolve.

Group Selection in the Evolution of Religion: Genetic Evolution or Cultural Evolution?

2015 ◽  
Vol 15 (3-4) ◽  
pp. 235-253 ◽  
Author(s):  
Taylor Davis
Keyword(s):  
Human Evolution ◽  
Cultural Evolution ◽  
Group Selection ◽  
Genetic Group ◽  
Genetic Evolution ◽  
Psychological Traits ◽  
Religious Psychology ◽  
Religious Evolution ◽  
The Relationship

In the scientific literature on religious evolution, two competing theories appeal to group selection to explain the relationship between religious belief and altruism, or costly, prosocial behavior. Both theories agree that group selection plays an important role in cultural evolution, affecting psychological traits that individuals acquire through social learning. They disagree, however, about whether group selection has also played a role in genetic evolution, affecting traits that are inherited genetically. Recently, Jonathan Haidt has defended the most fully developed account based on genetic group selection, and I argue here that problems with this account reveal good reasons to doubt that genetic group selection has played any important role in human evolution at all. Thus, considering the role of group selection in religious evolution is important not just because of what it reveals about religious psychology and religious evolution, but also because of what it reveals about the role of group selection in human evolution more generally.

South Africa’s increasing climate variability and its effect on food production

2021 ◽  
pp. 003072702110049
Author(s):  
Mashudu Tshikovhi ◽  
Roscoe Bertrum van Wyk
Keyword(s):  
South Africa ◽  
Climate Variability ◽  
Food Production ◽  
Fixed Effects ◽  
Crop Yields ◽  
Negative Impact ◽  
Secondary Data ◽  
Mean Annual Temperature ◽  
Fixed Effects Panel Regression ◽  
The Impact

This study examines the impact of increasing climate variability on food production in South Africa, focusing on maize and wheat yields. A two-way fixed effects panel regression model was used to assess the climate variability impacts, analysing secondary data for the period 2000 to 2019 for nine provinces in South Africa. The study found that increasing climate variability has a negative impact on maize and wheat production in South Africa. Specifically, the results indicated a negative correlation between mean annual temperature with both maize and wheat yields. A decrease in precipitation affected maize yields negatively, while the impact on wheat yields was positive, although insignificant. This analysis, therefore, depicted that crop yields generally increase with more annual precipitation and decrease with higher temperatures. The study recommends that funding initiatives to educate farmers on increasing climate variability and its effects on farming activities in South Africa should be prioritised.

scholarly journals Exploring Farmers’ Management Practices and Values of Ecosystem Services in an Agroecosystem Context—A Case Study from the Eastern Cape, South Africa

2019 ◽  
Vol 11 (23) ◽  
pp. 6567 ◽  
Author(s):  
Dennis Junior Choruma ◽  
Oghenekaro Nelson Odume
Keyword(s):  
South Africa ◽  
Ecosystem Services ◽  
Food Production ◽  
Management Practices ◽  
Crop Yields ◽  
Management Strategies ◽  
Agricultural Management ◽  
Eastern Cape ◽  
Provisioning Ecosystem Services

Globally, farmers remain the key ecosystem managers responsible for increasing food production while simultaneously reducing the associated negative environmental impacts. However, research investigating how farmers’ agricultural management practices are influenced by the values they assign to ecosystem services is scarce in South Africa. To address this gap, a survey of farmers’ agricultural management practices and the values they assigned towards ecosystem services was conducted in the Eastern Cape, South Africa. Results from the survey show that farmers assign a high value on food provisioning ecosystem services compared to other ecosystem services. Irrigation and fertiliser decisions were mostly based on achieving maximum crop yields or good crop quality. The majority of farmers (86%) indicated a willingness to receive payments for ecosystem services (PES) to manage their farms in a more ecosystems-oriented manner. To encourage farmers to shift from managing ecosystems for single ecosystem services such as food provision to managing ecosystems for multiple ecosystem services, market-oriented plans such as PES may be employed. Effective measures for sustainable intensification of food production will depend on the inclusion of farmers in the development of land management strategies and practices as well as increasing farmers’ awareness and knowledge of the ecosystem services concept.

Cultural Selection, Axiological Reasoning, and Paradiastole (I)

2007 ◽  
Vol 48 (1) ◽  
pp. 173-189 ◽  
Author(s):  
W. G. Runciman
Keyword(s):  
Cultural Evolution ◽  
Practical Reasoning ◽  
Attitudes And Beliefs ◽  
Heritable Variation ◽  
Cultural Selection ◽  
Competitive Selection ◽  
Rhetorical Device ◽  
Selection For

In the course of cultural evolution, both attitudes and beliefs are continuously modified by heritable variation and competitive selection. For Raymond Boudon, this process is exactly the same in the two cases, since in both axiological and practical reasoning consensus depends on a shared acknowledgement that the agreed conclusions are the products of “strong” reasons. His argument is, however, open to objection on psychological and sociological as well as philosophical grounds, and is vulnerable to the traditional rhetorical device known as paradiastole.

What determines evolutionary brain growth?

2001 ◽  
Vol 24 (2) ◽  
pp. 278-279 ◽  
Author(s):  
Francisco Aboitiz
Keyword(s):  
Human Evolution ◽  
Brain Size ◽  
Processing Capacity ◽  
Brain Growth ◽  
Developmental Constraints ◽  
Size Evolution ◽  
Selection For

Finlay et al. address the importance of developmental constraints in brain size evolution. I discuss some aspects of this view such as the relation of brain size with processing capacity. In particular, I argue that in human evolution there must have been specific selection for increased processing capacity, and as a consequence for increased brain size.

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