Humans are like the primate version of ants/bees. With the exception of North Americans/Aussies, who had many generations to get used to a lot of personal space, including having a personal patch of land. Hell, I remember apartments being considered for the "newly wed and nearly dead", not as a way of life. I guess condos went and changed that perception ... I guess around the time the Jeffersons "moved on up" from a house in a nice neighbourhood in Queens to some shitty penthouse apartment in urban hell Manhattan.