Although the various weapons had developed due to the War World 3, scientist have later discovered that by training your body constantly, people can prolong their lifespan.
Due to this discovery, the world's population suddenly placed more importance to hand to hand combat to weapons.
Although weapons can still kill people more swiftly and easily, hand to hand combat can help an individual to train the person's body which in turn can prolong the lifespan of the individual.
Also, this situation automatically made dojos and gyms to become exceedingly popular overnight. Even the World Class Families began to invest and create both dojos and gyms along with equipping it with state of the art combat rooms and equipment which can help both family and non-family members to quickly become efficient in hand to hand combat.
Another impact the scientist research caused is it made the various combat styles like kungfu, taekwondo, karate, tai chi, e.t.c to become immensely popular among the world's population. It even went to the extent that people like black belts in karate, kungfu grandmasters e.t.c are being respected by presidents, prime ministers and even the top business men in the world