This belief, and a horrid past (and present) of exploiting, plundering, murdering, etc all over the world, from the Crusades and colonial times to the Holocaust and onwards, is what makes it one of the most bloody and backwards "achievements of the human species".
Some exhibits from the "greatest achievement of the human species":
https://en.wikipedia.org/wiki/Human_zoo
https://en.wikipedia.org/wiki/The_Holocaust
https://en.wikipedia.org/wiki/World_War_II
https://en.wikipedia.org/wiki/Colonization_of_the_Congo
https://en.wikipedia.org/wiki/Hundred_Years%27_War