A clash of civilizations is not a winner-takes-all type of game. Our world is enriched by the wisdom of many civilizations which have failed and died in the past.
In the words of the Nigerian poet Christopher Okigbo:
We carry in our worlds that flourish
Our worlds that have failed.
In the words of the British poet T. S. Elliot:
Whatever we inherit from the fortunate
We have taken from the defeated.