Geoffrey West gave an interesting TED talk about the way animals, corporations, and cities scale . The main factor is the way that various variables scale in proportion to size. On a logarithmic graph the growth of a city shows a steady increase in both positive factors such as wages and inventions and in negative factors such as crime as it grows larger. So it seems that we need to decrease the crime rate significantly to permit the growth of larger cities and therefore gain more efficiency.
The Mankind Project (MKP) has a mission of “redefining mature masculinity for the 21st Century” . They have some interesting ideas.
Phillip Zimbardo gave a provocative TED talk about the demise of men . He provided little evidence to support his claims though.