A theory that can explain this finding from an evolutionary perspective is the parasite-stress theory which explains that an increase of infectious disease can cause humans to evolve selectively according to these pressures. Evidence also shows that as disease risk gets higher, it puts a level of stress on mating selection and increases the use of polygamy. In regions such as Sub-Saharan Africa the use of polygyny is commonly practiced as a consequence of high sex-ratios more males born per females and passing on heterozygous diverse genetics from different females to offspring. Another reason that polygynous communities have larger age-gaps between spouses is that intrasexual competition for females increases as fewer females remain on the marriage market with males having more than one wife each , therefore the competitive advantage values younger females due to their higher reproductive value. Smaller than average age-gaps[ edit ] Comparatively in Western societies such as the US and Europe, there is a trend of smaller age-gaps between spouses, reaching its peak average in Southern Europe of 3.
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Schmitt April 12, 23 Comments A few years ago, I was giving an invited presentation to an audience of mostly sociologists and family studies professors on the topic of evolution and human reproductive strategies. I kid you not, I could see rows of people who looked genuinely horrified. It seems to me many critics of evolutionary psychology cling steadfastly to false stereotypes of the field, both theoretical and empirical. Add to that the methodological breadth of different techniques used by evolutionary scholars to test hypotheses about the adaptive design of the human mind, and it is understandably difficult to know what all evolutionary researchers have been, and currently are, up to as active Darwinian scientists. Perhaps more than other social scientists, evolutionary psychologists use an incredible variety of research methods, ranging from self-report surveys and behavioral field test experiments, to investigations involving genetics, hormones, and neuroscience, to cross-species and cross-cultural comparisons, to ethnographies of foraging societies and computer modeling of artificial intelligences   .
“Yes, but…” Answers to Ten Common Criticisms of Evolutionary Psychology
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The first Sumerian king Alulim , at Eridu , is described as reigning for 28, years, followed by several later kings of similar periods. In total these antediluvian kings ruled for , years from the time when "the kingship was lowered from heaven" to the time when "the flood" swept over the land. A layer of riverine sediments, radiocarbon dated to ca. Polychrome pottery from the Jemdet Nasr period — BC was discovered immediately below the Shuruppak flood stratum. The "flood" described in the Sumerian King List, is believed to have a historical basis, and has been dated BC.