Humanitarians change the world but so do inventors. I would argue that Edison, Bell, Ford and the like all changed the world significantly. Did they change it

Humanitarians change the world but so do inventors. I would argue that Edison, Bell, Ford and the like all changed the world significantly. Did they change it for the better? Who is to say? Mandela, King and Ghandi certainly were overt in their motives to change the world for the better, so in many ways they may be more visible targets, but Bill Gates, Tim Berners-Lee, and the whole current raft of inventors of Twitter, Facebook, etc. have certainly changed the world.