Who was the greatest NBA rookie of all time?

Who had the greatest impact their rookie season? The greatest phenom? the greatest difference maker? The greatest crowd pleaser? Simply put: Who was the best during their first season? A list of some great rookies: Michael Jordan, Earvin "Magic" Johnson, LeBron James, Carmelo Anthony, Oscar Robertson, Wilt Chamberlain, Julius Erving, David Thompson, Lew Alcindor ( Kareem Abdul Jabbar), etc. the list goes on and on.............................