Other (please explain)
Anyway. I think the world would be much better if nobody adhered to the Abrahamic religions (Islam, Judaism, Christianity) or any of their twisted offshoots.
The world needs to be spiritual, but those three are so incompatible with nature, natural behavior for humans and they have caused so many horrible things in the world that I think they are worse than anything else.
A little example would be that the Christians took Cernunnos/Pan/Herne etc, a deity found in many tribal societies all over Eurasia in ancient times, and made him their religion's "Bad Guy", naming him "the devil".
The god of nature is the reason the devil has horns. That's just one silly little tidbit, however.
If you look at social development and such... The Celtic World when the romans had not yet killed the crap out of them, killed the men, raped their wives and made them and the kids "roman"...
Well, let's just say that the equality enjoyed by both men and women in that time and place wouldn't see the light of day in Europe until the 1900's.
In ancient europe, women were allowed to own stuff and some even became chieftains of their tribes. Many women were traders, priestesses and held really important jobs.
Not until the Napoleonic Code which was made law in a lot of the countries in the early 1800's were women even allowed to OWN PROPERTY.
It's all Rome's and the Christians' fault, and I will never forget that. Neither should the world.
Being a pagan comes with fewer rules, and that makes people behave like they would naturally.
There is nothing that I dispise more than "God-fearing people" who are essentially greedy, evil sons of bitches but hide under this fake-nicety that all christians have.
Yes, my answer would be that the world can do much better with Christianity, Judaism and Islam.
It took the world nearly 2000 years to recover from Christianity/Islam, and it has tried to stop social development, science and ideological advances during the whole time. At every f*cking turn.
Not until now when the yoke of the Abrahamic religions is starting to break from the strength of humanity are we seeing any real improvements.
The bible is just a really crappy fantasy book, written by several people over the years and made into a compendium by the Vatican (who left most of it out) to create an ideology for crowd control.
I'm not going to comment Judaism and Islam, those are even worse in some ways. More radical, but they have had less impact.