It seems what you are questioning is the nature of good.
What seems never to be considered in these types of discussions is, does the second law of thermodynamics allow for Gods? If it does then it would seem that
It is an integral part of a closed system of mutable parts. Claiming that
It is outside of the system is even more implausible since we know of nothing outside of this universe that exist or that has any influence on it.
Or, does God(s) allow for all of the laws thermodynamics?
Yes, it follows that if we define the universe as all that exist, then it is a closed system and "Nothing" can exist outside of the universe.
If God exists He/She/It is part of the universe and therefore part of the closed system.
If this is the case and such things as consciousness, will, thought and ideas exist then they too are part of the closed system.
If this is the case then the observable physical universe must be a part of, a subset of, the entire universe.
If this is true then there must be a cause the increases the good in the universe?
I think that many do not understand the notion of infinity. God is infinitely powerful by definition so everything must be infinitely insignificant and small compared to him. So, thinking that any physical law allows the existence of God is wrong, it is the other way around. As far as suffering and evil is concerned, it is not Gods doing but we on our own choose to create it, perpetuate it and not regret it when we see the results due to our selfishness and pride.
Concerning the God gene, I am very sceptical on all sorts of studies aiming to prove race IQ, the existence of god or other, since funding in science dictates they all have an agenda. Besides I haven't seen the study yet and I don't think it examined why people ended up believing in God or the function of that gene (existence of a gene with such an effect in psychology should win a Nobel prize).