1. The document discusses whether there are common backgrounds that all humanity draws reference from, such as shared emotions, historical biases against figures like Hitler, experiences of pain and oppression, and exposure to certain ideas.
2. Barriers that prevent humanity from relating to each other, like race, class, religion, and differences of political opinion, are also mentioned.
3. The concept of a shared "human culture" is debated, with suggestions including the emotions we all feel like pain and happiness, the seven deadly sins, and our need to interact and create things.