Unix is polytheistic and depends extensively on unseen deities, called daemons, so atheism is not strictly possible. The init daemon is the first daemon which is begat directly by the kernel and it creates daemons for other purposes and when they die, it creates them again. Daemons usually contact you with syslog and can send you email also. Since init is the parent or ancestor of all other daemons and user processes, it's always process 1. Since daemons are required and contact with the unseen is common, there aren't really atheists in unix. Loyalty to one daemon isn't required, though.
The init daemon is the traditional source of immortality and overseer in Unix, so you may want to make an offering to this daemon or recite its spells. But there may be other daemons that could offer you more features.
It's a good question. I was wondering that myself when I was writing the comment. Either the kernel would have to restart it or it would bring down the system, because no other process would have a parent.