Bill Gates gave the world Excel, Word, Powerpoint, etc, so the humanity could become creative, educated and thriving. Zuckerberg gave the world social media and the world became ...
I know it's a joke, but positioning Bill Gates, especially early-'90s-era Bill Gates, as some sort of savior doesn't work for me.
Now, Knuth gave the world TeX, and I'm all on board for praising that contribution to humanity.
He did it so he could get really really rich. That's why Zuckerberg did it too.