Ask HN: Who/What would you have liked to have heard in college?

If you were in college (computer science/engineering) and had the opportunity to hear absolutely anybody in the world give a talk, who would that person be and what would you want to hear?

Would you listen to Ray Kurzweil giving a talk about Transhumanism or his inventions? Would you listen to Richard Stallman giving a talk about the FSF?

Or would you rather hear someone give a talk about nutrition/something non-computer sciencey?

Names and topics would be really helpful.