You can't really believe this, as it's so obviously wrong.

It is also a contention that has pretty racist adherents; Charles Murray's Human Accomplishment book comes to mind. This isn't a coincidence, as suggesting that non-western peoples have contribute nothing of value to this "we" is pure western chauvinism, which is racism's non-identical twin brother.

From religion to letters to numbers to agriculture to civilization itself, these are not the product of the west.

I think you are crediting too much to the west.