Ok, this was a manga I read a long time ago. I dont remember how it starts but I remember the end (well about it; it was the end that I really liked)
It end with a battle of sorts right outside of Earth, I think that there was some lifeforms/giant creatures or macha-like things. Somehow it was about the absence of god. It ends (I dont remember how) and one of the characters spends years looking for the reincarnation of one of the protagonists and finds a little girl that doesn't speak I think that drew a picture book with a strange story that I think was the answer to where god went.
The absence time I think was 2000 years and the story at the end said about continually reincarnating as a human and something about ending wars and disputes...
That's all I remember really. I know they are fragmeneted but I just remembered it now while watching Supernatural (Don't ask, I dont even like the series so much. It's just that it came to my mind that recently more and more series have stories and themes that resemble things that you would expect reading in manga and in lesser frequency comics 😛 ) and I remember that I really really liked the end and somehow the conclusion agreed a lot with me and some thoughts of mine I had make over the years... So if anyone could help it would be greatly appreciated.

Sounds like the end of Happy World for me

For the sane people I am insane,for me the sane people are insane!

Yep that's the one. Than you very much DarkBlade