I think Religion can be a wonderful thing for some people, but can also cause alot of pain and hurt people in many ways. Faith can help people through crisis and problems, but because of that i might lead people to do the wrong things (e.g. not taking medicine because god will help). And then there are wars inspired by religion, but im also certain that people would find diffrent reasons for war if there was no religion.
There would still be conflics because of ethnicty and for economic reasons. But there are also those who are united by religion.
The list of pros and cons could go on and on, what do you think?
Do you mean religion in 3rd world countries is bad because they might act irrational because of missing education and easier ways for manipulation, or are there religions that you would classify as 3rd world?
religion and 'not taking medicine because god will help' have nothing to do with each other. unless you're a christian of a strange/obscure sect in which case thats just their belief :/
overall, religion +1