You're getting lunch with three famous historical people (from the last two centuries). Who are you eating lunch with?

I'm chowing down with Nikola Tesla, Karl Marx, and Carl Friedrich Gauss. Although I think Marx would feel out of place, given the other two are scientists (and Gauss also a mathematician). I think Tesla would love Marx, though, given how Tesla seems to have loved the concept of free energy and just doing things without really expecting anything in return.