Parental investment is the key to understanding sex differences in mating strategies.
I don't do styles. I'm interested in the uniqueness of a place and time.
发展需要消除不自由的主要根源:贫困和暴政,经济机会的匮乏以及系统的社会剥夺,公共设施的忽视以及压制性国家的过度活跃或不宽容。
最大的风险是不冒任何风险。在一个快速变化的世界里,唯一注定失败的策略就是不冒险。
Systems have sub-systems and sub-systems have sub- systems and so on ad infinitum - which is why we're always starting over.