A lot of the issue is how did we anticipate going from 1 billion people to over 7 billion? We didn't There are a lot of people that need somewhere to live and t

A lot of the issue is how did we anticipate going from 1 billion people to over 7 billion? We didn't There are a lot of people that need somewhere to live and the supply doesn't keep up with the population that is always growing. If a couple raised kids in an area and those kids want to stay there and have their own homes, while their parents also stay and have their own homes, the demand multiplies per every kid.