亲代投资是理解性别差异起源的关键。
"Parental investment is the key to understanding the origins of sex differences."
The best way to predict the future is to invent it.
文化生态学与人类生态学的不同之处在于它强调文化被修改的适应过程。
If you want to be the best, you have to be able to handle the worst.
The true measure of a civilization is how it treats its weakest members.