Is Social Darwinism Still Relevant?

It seems to me that we are all on the same page when it comes to the idea of pacifism and it’s importance. Even though my theories are based on how organisms fight for survival, seeing present-day problems it’s clear to me that pacifism is the key for solving those issues. One thing I did say in the past seems to have become true though, “At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate, and replace the savage races throughout the world.” (In text citation). This is not Social Darwinism nor was I a supporter of it, where human superiority over others is justified by race or class, but merely natural selection of civilized and barbaric people. This is relevant because