Man’s environment has charged drastically. He was used to living in bands with no more than 170 others. Now he is expected to cope with 7 billion. During such times of rapid change you can expect those who cannot cope with the changes not to reproduce. I notice myself avoiding interacting with more than about 20 people to partially sidestep the problem.
~ Roedy (born: 1948-02-04 age: 64)