bill gates created microsoft, which then created windows, which in turn is being used to assist science, medicine and lots of other important stuff, not to mention making people's lives easier.
also, you're likely also using a Windows computer to dismiss all of the above.
that doesn't mean windows changed the world. tons of other things can do just that, easily, and already do
and I used charmin toilet paper a while ago. charmin didn't change the world. neither did fujitsu, who made the laptop I'm using, nor badspot, who created the forum that I'm posting on