Most parents today don’t view childcare as an “expectation of reciprocity,” and it was unlikely to be the case among Neanderthals。
一篇关于尼安得塔人的报道。说他们会照顾有残疾的成员。随便提到他们照顾小孩不是为了回报。现在的人也不是。well， so they don't know Chinese parents. 中华文明果然独立于世。