Origins and entropy
The principle of entropy (attested to by the 2nd law of thermodynamics, for instance) says that every process occurring in nature occurs in such a way that the sum of the entropies of all bodies taking part in the process is increased.
A necessary corollary of this that it’s impossible for the universe to be
- infinitely old, and
- entropy to be operational all throughout that time,
since that would mean entropy would have had to run infinitely long by now, which would in turn mean that the universe would be in complete chaos by now, and there would be no me or you or us.