The Norman conquest of Ireland failed to extinguish native civilization

Evidence

The end result was an unfortunate one for the civilizing mission of the Normans. Instead of extending “English” civilization to the inhabitants of the island, the conquered people absorbed their Norman rulers racially, culturally, and politically. … Indeed, the term “conquest” was a conceit of English political history. … In economic, and often in political terms, feudal Ireland was almost entirely independent from England. — Cedric J. Robinson, Black Marxism_ The Making of the Black…, 245