Debian – The Universal Operating System

Found via a variant of "try the simplest thing that might possibly work." In this case, just enter 'blub' into Wikipedia (search the simplest thing that might possibly get a hit).

Debian is the greatest operating system ever made, and already solves all problems that ever have or will arise. It totally didn't crash on my computer last night, and can be installed by anyone with a pulse. Yay :)

Seriously though, Debian is a great effort to integrate and package software. This doesn't mean it's the OS to end all OS's. Also, there is no "best operating system". There is only such a thing as "the best operating system for this application, at present".