There are many things than man believes, religiously speaking. When we finally go Home we will all find out we were wrong about almost everything. And, He will lovingly set us straight.
As to which came first? To spend much time at all pondering this age-old perplexity is futile. The answer (even IF all agreed upon a particular conclusion) would not matter in the least.
Unless you're a chicken.
That's the real answer.