The evolution of the game is based on hacking the rules. The step back 3-pointer is based on the fact that you can take two steps and glide to the rim (layup or

The evolution of the game is based on hacking the rules. The step back 3-pointer is based on the fact that you can take two steps and glide to the rim (layup or floater) or one step sideways, then back and jump shoot (fadeaway) so why not take two steps back then jump forward (step back 3) which you have to do anyway to create enough forward momentum on your shot to avoid muscling the shot (Lebron-style step back 3) and getting tired eventually (if you're not Lebron). It's innovation at its finest, or better yet, iteration. Because anyone watching the game knows that Steph Curry made the step back 3 a game changer in today's NBA. Harden just perfected it.