Well we have had the Crusades, 30 years war, Lebanese Civil war, the Northern Ireland troubles and currently the war in Afganistan.
I would say no, religion is not a force for good.
However Oxfam, Médecins Sans Frontières, Band Aid, Save the Children, Action Aid etc are all non government or have religious conections, yet save many many lives worldwide.
Less, in the other thread, said that the people of Africa were quite happy until the Missonarys came and taught them the way of the Lord.
Having seen the corruption and poverty in various parts of Africa, I even have had a AKMS (folding stock version of AK47, I think) aimed at me and my crew in Nigeria, I feel I am able to comment on this.
Graham, welcome, please be aware we have a quota for preachers of the good book and that is already taken by your brother K99wrd