I really loved making my mom laugh, and I knew that she thought that I was funny. It was really valuable, in my home growing up, to be able to have a chat and participate in a conversation and be funny. Whatever I could do to make my mom laugh could either get me out of trouble or just get me more attention or get me respect in the house.
Social class has worked for years. Born into the right family, go to the right schools, even if you're not super bright to start with, you'll turn out bright. You go to the right university, you get the right job, you have the right connections, you'll make it to the top. Job done, very efficient.