Paradigm shift — noun a radical change in underlying beliefs or theory
[C20: coined by T.S. Kuhn (1922--96), US philosopher of science]
Example: The Fosbury Flop
Before Mr Fosbury. ALL high jumper cleared the bar one of two way: A Straddle Kick Jump, or a Siccior Kick Jump. In 1968, at the Oylmpics in Mexico, Mr. Fosbury clear the high jump and obtained the gold medal by what appeared to be jumping backwards over the bar and "flopping" into the pit below.
His method was so succesful it is now the dominate way of mastering the high jump. He techinque represent a paradigm shift in the way to approach the high jump.