Royce Gracie used Brazilian jiu-jitsu in the early years of UFC to defeat opponents of greater size and strength.. Art Davie proposed to John Milius and Rorion Gracie an eight-man single-elimination tournament called “War of the Worlds”. [25] It was inspired by the “Gracies in Action” video-series produced by the Gracie family of Brazil which featured Gracie jiu-jitsu students defeating …