Each individual is just a cell within an immense, universal body. The collective good of that body is God. The collective bad is called the Devil (the evil), and a slew of other names not even worth mentioning here.
So some people who enter into our lives nourish and help us grow, while others act to introduce deadly viral strains into the collective. Some people may even grow strong within hateful groups (cell cultures) that, ultimately, amount to little more than a deadly cancer of the collective human soul. And all of this, and much more, is merely the most basic of concepts that theologians have posited for countless millennia now.
But don't worry, one day, Science Almighty will finally catch up, just to finally clarify, classify and assign it all the proper scientific terminology. And then they'll sit back, smile smugly to themselves, and act like they invented it all to begin with.