Sports in North America credited with creating the game of basketball in 1891. While working as a physical education professor and instructor at the International Young Men's Christian Association Training School (YMCA) (today, Springfield College) in Springfield, Massachusetts, U.S., he primarily created the game as a way to could keep his gym class active indoors on a rainy day. The sport quickly spread throughout the U.S. and Canada, with Naismith becoming instrumental in establishing college basketball. Today, the National Basketball Association (NBA), with teams in the U.S. and one in Canada, is widely considered to be the highest level of professional basketball in the
James Naismith could help its track athletes to keep in shape and explicitly emphasized to "make it fair for all players and not too rough." In his attempt to think up a new game, Naismith was guided by three main thoughts. Firstly, he analyzed the most popular games of those times (rugby, lacrosse, soccer, football, hockey, and baseball); Naismith noticed the hazards of a ball and concluded that the big soft soccer ball was safest. Secondly, he saw that most physical contact occurred while running with the ball, dribbling or hitting it, so he decided that passing was the only legal option.