Those of us who live in towns have learned to adjust ourselves to some degree to the kind of overcrowding which seems to be an inevitable consequence of city life；but the closer we are packed, the more easily resentful of each other do we tend to become. It is probably on this account that many people find life in cities irritating and exhausting, since they are compelled to control aggressive impulses which arise solely as a result of overcrowding. It is also probable that it is because of the wider spacing between individuals which is usual in the countryside that rural folk are less tense, more friendly and often better mannered than urban people.