Carlos Gracie
In 1917, a teenage Carlos Gracie watched Mitsuyo Maeda - a Japanese judo and jujutsu master - give a demonstration in Belém, Brazil. He was transfixed. He sought Maeda out, became his student, and spent years learning the throws, pins, chokes, and joint locks that Maeda had carried from Japan.
What Carlos built from that foundation was something new. He stripped out the elements that required brute strength. He tested everything in challenge matches - open invitations to anyone who believed they could defeat his family's art. He codified the technical system. He produced nine children who carried the art forward.
Brazilian Jiu-Jitsu as a distinct discipline begins here. Every lineage in the world leads back to this man.