Most labor scarce overseas countries moved decisively to restrict their immigration during the first third of the 20th century. This autarchic retreat from unrestricted and even publiclysubsidized immigration in the first global century before World War I to the quotas and bans introduced...

Modern economic growth, defined as a sustained rise in per capita income (Kuznets 1966C001-025), has created higher levels of prosperity for many more people on earth than was ever thought possible before it began. Moreover, it began not so very long ago, perhaps as late as the middle of the...