ICON

I chose sir Timothy John Berners-Lee (Tim).

Lets say that if Tim never invented the World Wide Web the internet would not have been as it is today. Tim's invention introduced a  pillar that contributes to the support that keeps the human society together. Countless services used by governments, research institutions and laymen people like you and me are hosted on the web. Imagine that the web would suddenly disappear. All bank accounts, hosted knowledge and all of your online social life gone in a second. 

With Tims invention of the web a whole world of possibilities opened up. 

No need to say more.