The man that invented the C programming language and co-invented UNIX, has passed. When you think about impacts of individuals on the world, it’s hard to find people that had quite the same impact.
C issued in the era of portable computer programs, ones that could compile on multiple types of servers, which was really a new concept at the time. UNIX issued in the era of network connected servers, using commodity protocols. Without UNIX the ARPANET project, which became the internet, would not have succeeded.