Following philosopher Yuval-Noha Harari, cooperation is the key to our human being and what humans achieved in evolution, making us humans more successful than other creatures on earth. „It is the unprecedented ability to cooperate flexibly in large numbers“ that makes us unique. No other creature on earth can cooperate in a way like this, ants and bees, f.e. also cooperate, but in a very rigid way or only close relatives. So you can’t compare an ant workforce and their cooperation with humans. 

Interactions with strangers and building new social cooperation networks in such an effective way is a human privilege.