Combat sports have existed for centuries and involve fighting techniques from various martial arts and combat sports traditions around the world. The document discusses several top combat sports - MMA, wrestling, fencing, muay thai, taekwondo, sumo, jiu jitsu, boxing, and karate. It provides brief descriptions of each sport, highlighting techniques used, rules, and origins in some cases. Combat sports integrate methods from different fighting styles while focusing on elements like hitting, wrestling, and ground combat.