Every major European capitalist center depended on an immigrant and ethnically distinct labor force

Evidence

Just as Nuremberg had ravaged Bohemia, Saxony, and Silesia, Braudel asserts, it was the Genoese who “blocked the development of Spanish capitalism.” It was, too, the “indispensable immigrant” who complemented the urban proletariat incapable of maintaining itself “let alone increas[ing] without the help of continuous immigration.” In Ragusa it was the Morlachi; in Marseilles, the Corsicans; in Seville, the Moriscos of Andalusia; in Algiers, the Aragonese and the Berbers; in Lisbon, Black slaves; and in Venice, the immigrant proletariat was augmented by Romagnoli, Marchiani, Greeks, Persians, Armenians and Portuguese Jews. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 204