Humanity is the human race, which includes everyone on Earth. It’s also a word for the qualities that make us human, such as the ability to love and have compassion, be creative, and not be a robot or alien.
The word humanity is from the Latin humanitas for "human nature, kindness.” Humanity includes all the humans, but it can also refer to the kind feelings humans often have for each other. Awww. But when you talk about humanity, you could just be talking about people as a whole. When people do bad things, it tests your faith in humanity. When people ask for money to help feed starving children, they're appealing to your sense of humanity.