Congrats on this great interview, Lex. <br><br>I think it conveys a taste of why quantum field theory is such a beautiful and fascinating subject. Like how this one basic form of equation – the Yang Mills Lagrangian – can manifest such radically different phenomena as the electromagnetic, weak, and strong nuclear forces. The QFT framework is also remarkably constrained by the basic principles of quantum mechanics and relativity, providing us with a narrow 'menu' of possible particle types (representations with spin 0, 1/2, 1, 3/2, 2). Especially remarkable that since the Higgs discovery, every possibility on the menu has been observed with the exception of the spin-3/2 gravitino. <br>We, as a species, should go to higher energies (~ shorter distances) to look for clues on the mysteries that remain. As Nima Arkani-Hamed would say: Build Big Circular Colliders!,(reply>), Electric discussion for me. I made some connections. Thanks!