Millie210
You are correct. The existence of god cannot be disproved but belief can be eroded bit by bit and science and research can reduce the probability that god exists.
Let's go back say 1,000 years. Science didn't really exist then. To say that the universe was created by god was a perfectly reasonable thing to believe back in those days. It wasn't as if any better theories existed then. NO other theories existed. Hell, even I would have believed in god back than. Back then, most people would have placed the probability that god existed at very close to 100%, if not at the magic figure itself.
We are now 1,000 years on. We now have science. We don't just have one theory of how the universe came into being, we have a number of them. Not one of them contravenes the laws of physics and not one of them requires the intervention of a sky wizard. For me, the probability of god existing is as close to zero as makes no difference. Each year that belief in god is measured in Europe, the percentage decreases. I believe that it stands at about 60% currently, but it's falling fast.
So, we may not need to disprove the existence of god for belief to dwindle to zero.
Dawkins once said that we could see belief in god completely disappear within the space of a generation. Hell, I'll drink to that (and I don't drink).