If you're talking using a time machine and taking either Haye back or Louis forward, David Haye would decapitate Joe Louis.

Sport science and athleticism has come way too far. An athlete from the 30's isn't going to compete with a modern athlete. That's just silly. Take a look at the olympic records/times back in the 30s when Joe was in his prime and now.

But you can only judge a guy by how he competed in his particular time, and Joe had an incredible legacy. He fought a lot of guys that had no business in the ring with him, but he did fight and destroy a lot of A-quality fighters, so to me Joe deserves the highest honours.

One of the true greats for sure.