The proper solution to overcrowding is privatizing those property holdings not yet privatized, not forcibly stopping productive people from coming to our country. Third, overcrowding is an elusive concept. Among the people who wrote to complain that immigration spawns overcrowding was a resident of New York City. But this person clearly doesn't mind crowds. If he did, he'd move to Oklahoma or Mississippi.
Manhattan is one of the most densely populated spots on earth.
Yet it is also one of the wealthiest. New Yorkers often complain of crowds, but no one is compelled to live in that city. The reason people live there is because economic opportunity in New York is vast. Living in close contact with lots of people is a price that many of us voluntarily pay for the opportunity to take advantage of the wealth-producing capacities of an extensive division of labor. New York and Los Angeles are crowded but wealthy.