We are the only species that can both manipulate our environment and enhance our natural abilities. We do this with our minds. Creativity is the key that allows us to live in the wastelands of the arctic or the tropical rain forest. The burning desert or the vast oceans. Hell even the cold darkness of outer space. We can travel faster than the speed of sound and lift objects that no other species could even attempt. With the proper incentive we can do almost anything by putting our mind to the test.
The fact that humans are the only animals, that I know of, that will adopt, and heal, a baby carnivore that would otherwise be their predator. And may still.be when the suckers grow up.
Empathy, compassion and being able to help others even if it will not benefit them at all. Trying to make the world a better place for all even with the ability to make it worse.