Kicks as an act of human aggression have likely existed worldwide since prehistory. However, high kicks, aiming above the waist or to the head appear to have originated from Asian martial arts. Such kicks were introduced to the west in the 19th century with early hybrid martial arts inspired by Asian styles such as Bartitsu and Savate. Practice of high kicks became more universal in the second half of the 20th century with the more widespread development of hybrid styles such as kickboxing and eventually mixed martial arts.