"Seven hundred years later, the Summa Theologica is no longer considered proof of anything."
Sez who? The cosmological proof of God, which is just a refined version of Aquinas' and Aristotle's "first mover" proof, is still as strong as ever. That's why the atheists invented the silly concept of multiverses; to get around the cosmological argument.
Agreed - and I find the multiverse idea somewhat ironic - an infinite amount of universes and we live in one of the lucky ones. But theoretically with infinite universes, you could have a universe with god-like beings and even a universe with Dawkins as a televangelist. But ultimately it is all still meaningless... The brain becomes just another organ following physics and chemistry – there is not free will – no self – no morality – no reason or logic.