Everybody had one of these beautiful Nerf spiral footballs back in the early 1990s, and for good reason: these footballs were awesome. That is, they were awesome if you were right-handed. If you were left-handed, rather than spiral, the football would just flip around a few times and make you look like a girl.
However, most people are right-handed, and for them, this ball was great. Gone were the days of looking like a fool while throwing a regular football, anybody could toss up a hail mary spiral with the Nerf spiral football.
A more valuable contribution has never been made to mankind.