Just look at all the social changes and violence around the world. People rioting, gang violence. And even look at Japan's population collapse and compare it to the mice study.

Nearly half of Japanese adults do not start having sex until after they reach 34 years of age, as the majority of young adults remain single in the country, where the population has fallen by nearly 1 million in the past five years.

The study, conducted by the National Institute of Population and Social Security Research, revealed that 42 percent of the men and 44.2 percent of the women aged 18 to 34 are still virgins in Japan.

The trend in society seems to have deteriorated since the last study came out in 2010. At the start of the decade, only 36.2 percent of men and 38.7 percent of women said they had never had sex.

Furthermore, as the new research revealed, the trend is unlikely to change in the near future as 70 percent of unmarried men and 60 percent of unmarried women have still yet to find a partner for a steady relationship. https://www.rt.com/news/359631-japanese-virgins-study-demographics/

My colleague, Dr Halsey Marsden (1972), conducted several studies during the mid-third of Phase D in which he placed small groups of mice out of these crowded populations into new universes at very low densities. All groups exhibited nearly total loss of capacity for developing a structured society or for engaging in the full repertoire of reproductive behaviours. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1644264/pdf/procrsmed00338-0007.pdf