Who created jiujitsu?

Jiu-jitsu originated in Japan and was developed by the samurai as a method of unarmed combat that focused on using an opponent's energy against them. The modern form of Brazilian jiu-jitsu was popularized by the Gracie family in the early 20th century, particularly by Carlos and Helio Gracie, who adapted traditional jiu-jitsu techniques to create a new style that emphasized ground fighting and leverage.