According to many multiverse models today matter and energy have always existed, making the "first cause" problem irrelevant. A multitide or even infinite number of universes may be constantly dying and being reborn. One can hypothesize a creator god exists, but one is not needed.
Don't you mean, according to many proposals or theories? There is no solid evidence to support these proposals either - scientists are trying to find ways to discount the chance of an creator. These theories are nothing more than beliefs - they are simply trying to construst a thoery that can refute the odds of producing an atom, mankind, planetlife which are astronomically small, something like 1 chance in 10 to the 700 power (And this is quite conservative). I have read what Dawskins believes, the wave structure of matter and Wolf-Haselhurst; and they all lack anything worth considering as evidence.