The causational factors of infanticide

So, what situations stimulate infanticide? As we gather various reports, we can see some general underlying rules.

First of all, infanticide never occurs in nocturnal prosimians and species that raise infants in the nest. Also, in species in which infanticide does occur, males are larger than females. In addition, infanticide is most commonly reported in species in which males form groups with multiple females(multiples of both sexes*).

■References (Books, papers, Web articles, etc.)
暴力はどこからきたか——人間性の起源を探る』 第5章 暴力の自然誌―子殺しから戦争まで  山極寿一 (NHKブックス、2007)


*The social structure of primates can be roughly classified into “solitary,” “pair” (consisting of a male and a female), “polygynous” (consisting of a single male and multiple females), “polyandrous” (consisting multiple males and a single female), or “multiples of both sexes” (consisting of multiple males and females). Of these, “multiples of both sexes” is a mating system in which both males and females in a group have sexual relationships with multiple partners.


Related iCards:Itani’s model of social evolution (Vol 1.)


★If you interested in this text, please have the following ebook at hand. For that, Click on the URL below.

https://society-zero.com/icardbook/012/index.html

★This article is a piece of "knowledge card" that makes up iCardbook, "Evolution of Human Sociality(Juichi Yamagiwa, Shun Hongo)"

 

iCardbook, a card-type specialized book that organizes “Knowledge Cards” is a new form of book in the smartphone age.

 

■iCardbook Benefits:Good value for reading

・you can read it quickly in your pocket of time, e.g. commuting
・You can immediately understand the "drawing " in the author's head
・Amazon Prime members can read for free

 

◎About iCardbook(english)
https://society-zero.com/icard/icardbookenglish

◎About iCardbook(japanese)
https://society-zero.com/chienotane/archives/5067

The References list of “Evolution of Human Sociality”