The Impact of Linux and the GNU Project
The moment we talk about open-source, the first thing that comes to mind is Linux and Linus Torvalds. Though Linus Torvalds created Linux and engineered the kernel on which most of the servers work today, Richard Stallman promoted the concept of free software and started the moment in 1985. Back then, Richard Stallman created the legal, technological and philosophical foundation for the free software movement through the GNU Operating System. Without these contributions, it's unlikely that Linux and Open-Source would have evolved into the current forms that we see today.