The article attempts to fi nd an answer as to what internal security
is today and how it can be defi ned and placed in the conceptual framework
of other types of security, such as external and national security. As the
article underlines, the era of separating the concepts of internal and external
security has become out of date, which is due to the fact that security is in
a process of constant evolution, alongside with its defi nitional scope. Over
the years, the process of the evolution of internal security in Poland has
involved the change of both the very institutional system, understood as the
administrative apparatus of internal security, and the phenomenon of internal
security itself, which has been and still is being infl uenced by the changing
nature of security threats. The article describes the process of the evolution
of internal security in Poland, conditioned both by the socio-economic
development and by the transformation of the political system. Attention is
also drawn to the technological and information revolution in the context
of its huge impact on subsequent changes in the so-called phenomenon of
internal security globalisation, which creates a system of interdependencies
in the area of security, including international security.