Populations

The impressive variation amongst biological individuals generates many complexities in addressing the simple-sounding question what is a biological individual? A distinction between evolutionary and physiological individuals is useful in thinking about biological individuals, as is attention to the kinds of groups, such as superorganisms and species, that have sometimes been thought of as biological individuals. More fully understanding the conceptual space that biological individuals occupy also involves considering a range of other concepts, such as life, reproduction, and agency. There has (...) been a focus in some recent discussions by both philosophers and biologists on how evolutionary individuals are created and regulated, as well as continuing work on the evolution of individuality. (shrink)

Процесс старения населения захватил не только развитые страны, но и многие развивающиеся, превратившись в глобальный. Представляется, что он будет одним из самых важных процессов в ближайшие десятилетия, определяющим облик общества буду-щего и направление развития технологий. В статье дается анализ некоторых параметров процесса старения населения, показыва-ются его важные следствия для общества и мира в целом. На ос-новании этого анализа делается вывод о том, что грядущий тех-нологический переворот (обозначаемый авторами как завершаю-щая фаза кибернетической революции) и предполагаемый шестой технологический уклад, связанный с наступающей (...) шестой конд-ратьевской волной, будут связаны в первую очередь с прорывами в медицине и смежных с ней технологиях. Также авторы представ-ляют свой взгляд на финансовые инструменты решения проблемы пенсионного обеспечения увеличивающегося пожилого населения в развитых странах. Они считают, что при более целенаправленном использовании денег пенсионных фондов, направлении их (при нуж-ных гарантиях) на образование и рост квалификации молодежи развивающихся стран возможно частично облегчить указанную проблему в развитых государствах. (shrink)

With the further growth of the world population and the further intensification of the processes of interaction between countries and increasing movements of the masses of people, the role of Political Demography becomes more and more important. Issues of global ageing, migration, low fertility in developed countries (or very high fertility in some African countries), high mortality in many developing states (including deaths from AIDS); rapid change in the ethnic composition in Europe and in several other regions and many other (...) pressing issues are in the focus of this discipline. Some of these problems are analyzed in this yearbook. However, among those issues, the issue of global ageing becomes more and more pressing every year. It is sufficient to take into account the point that within two forthcoming decades a rapid global increase in the number of retirement-age persons will lead to its doubling within this fairly small historical period. The concerns about population ageing apply to both developed and many developing countries and it has turned into a global issue. In the next decades the population ageing is likely to become one of the most important processes determining the future society characteristics and directions of technological development. (shrink)

In the first part of this article we survey general similarities and differences between biological and social macroevolution. In the second (and main) part, we consider a concrete mathematical model capable of describing important features of both biological and social macroevolution. In mathematical models of historical macrodynamics, a hyperbolic pattern of world population growth arises from non-linear, second-order positive feedback between demographic growth and technological development. Based on diverse paleontological data and an analogy with macrosociological models, we suggest that the (...) hyperbolic character of biodiversity growth can be similarly accounted for by non-linear, second-order positive feedback between diversity growth and the complexity of community structure. We discuss how such positive feedback mechanisms can be modelled mathematically. (shrink)

Contemporary biology has inherited two key assumptions from the Modern Synthesis about the nature of population lineages: sexual reproduction is the exemplar for how individuals in population lineages inherit traits from their parents, and random mating is the exemplar for reproductive interaction. While these assumptions have been extremely fruitful for a number of fields, such as population genetics and phylogenetics, they are increasingly unviable for studying the full diversity and evolution of life. I introduce the “mixture” account of population lineages (...) that escapes these assumptions by dissolving the Modern Synthesis’s sharp line separating reproduction and development and characterizing reproductive integration in population lineages by the ephemerality of isolated subgroups rather than random mating. The mixture account provides a single criterion for reproductive integration that accommodates both sexual and asexual reproduction, unifying their treatment under Kevin de Queiroz’s generalized lineage concept of species. The account also provides a new basis for empirically assessing the effect of random mating as an idealization on the empirical adequacy of population genetic models. (shrink)

Biological research on race has often been seen as motivated by or lending credence to underlying racist attitudes; in part for this reason, recently philosophers and biologists have gone through great pains to essentially deny the existence of biological human races. We argue that human races, in the biological sense of local populations adapted to particular environments, do in fact exist; such races are best understood through the common ecological concept of ecotypes. However, human ecotypic races do not in general (...) correspond with 'folk' racial categories, largely because many similar ecotypes have multiple independent origins. Consequently, while human natural races exist, they have little or nothing in common with 'folk' races. (shrink)

Millstein argues against conceptual pluralism with respect to the definition of “population,” and proposes her own definition of the term. I challenge both Millstein’s negative arguments against conceptual pluralism and her positive proposal for a singular definition of population. The concept of population, I argue, does not refer to a natural kind; populations are constructs of biologists variably defined by contexts of inquiry.