Human relationships, he suggested, involve the same tension: we need one another, yet too much closeness can become draining. For most of human history, survival depended on that kind of cooperation. Individual survival depended on the success of the group. As I drafted this article, I read the headline: "No need to seek work for 100,000 with ADHD." Schopenhauer reminds us that we need solitude to think, create, and discover who we are.