继子女面临更大风险，因为进化压力塑造了父母更偏爱自己基因后代的心理。

Freedom does not consist in any dreamt-of independence from natural laws, but in the knowledge of these laws, and in the possibility this gives of systematically making them work towards definite ends.

A story is a way of making sense of the past.

每个故事都是一个讲述真相的谎言。