That sentence doesn't make sense. I think it means that a civilization is stronger the better able its citizens are able to tolerate different cultures. America is a very diverse place and one of the strongest countries in the world, if that helps.
That sentence doesn't make sense. I think it means that a civilization is stronger the better able its citizens are able to tolerate different cultures. America is a very diverse place and one of the strongest countries in the world, if that helps.