According to what I've read in popular accounts of modern physics, cause, effect, contingency, necessity etc. all disappear at the quantum level, where things pop into and out of existence with no prior cause, the cause and effect that we see at the everyday level being statistical, not absolute. Furthermore, the big bang, in its ultimate origin, was a quantum event. Therefore, may it not be that the universe just popped into existence for no reason? I dare say I've completely misunderstood the science, so I post under correction.
I wonder if the appearance AND disappearance is significant here. Of course. Something which exists and then doesn't isn't rare in the universe since that is the condition of everything we see and we call these temporary things contingent things.
What that does to the idea that we can't say that anything is contingent you'd better ask Nearly Sane.