How did european "ethnics" become white? what changes made this possible?

- "The Melting Pot" helped to influence the assimilation of "whiteness", and in result the courts began to determine who was white by law.

<3

for the united states of america, 1945 to 1964 was a time of high economic growth and general prosperity. it was also a time of confrontation as the capitalist united states and its allies politically opposed the soviet union and other communist countries; the cold war had begun.

explanation:

i'm not certain but i'm pretty sure it was spanish and portuguese america.