I met Stallman a long time ago in Florida where i was doing my masters. He gave us a lecture on the free software foundation and boy was that good. He was a strange guy though rubbing a cold coke can under his shirt because he was constantly perspiring!
I think open source has changed the world. Originally he wanted all software to be free so that monopolistic companies like Microsoft would not be so successful. But the same companies have appropriated open source software in all their solutions and are literally cocking a snook at the FSF community. They also contribute heavily to making open source compatible with their own products.
However there is a silver lining and that is because of linux (and other free software) 1000s of small companies have sprung up offering solutions that would have been impossible for them earlier. The cloud today is built on open source. I am sure steemit itself is using open source in some form or the other. I think FSF and Stallman deserve a huge round of applause for their dedication and passion