Earlier quoted context omitted.
Germany comes to mind as a counterexample: a homogenous nation until the late 1950s, with no colonies to speak of, and jus sanguinis. Yet it transition to a functioning, diverse society today. And Japan is arguably paying a steep price for keeping their blood oh-so-pure: it's a society frozen in tradition and fear, with an economy in what is essentially a 20-year recession. Making robots care for the elderly will jus…
(West) Germany's ascent to a multicultural nation began accidentally, as the post-WWII economic miracle and the closure of borders with the GDR led to a shortage of workers which was to be remedied with an import of guest-workers from the Republic of Turkey. German employers' lobbying and the worsening of global economic outlook in the 1970s led to these temporary measures being made increasingly permanent, with a pa…
Japan today and Germany 196x share the labour shortage. But Japan's demographic problem adds a second incentive to encourage immigration, whereas Germany back then was experiencing the baby boom. So, if anything, Japan has an even better case for immigration today than Germany 60 years ago.