Culture isn't "real". (part 3)

From Will and Ariel Durant's, The Lessons of History, page 31.

"Racial" antipathies have some roots in ethnic origin, but they are also generated, perhaps predominately, by differences of acquired culture - of language, dress, habits, morals, or religion. There is no cure for such antipathies except a broadened education. A knowledge of history may teach us that civilization is a co-operative product, that nearly all peoples have contributed to it; it is our common heritage and debt...