Religion causes war?

There have been horrible atrocities commited by evil men in the name of God, undoubtedly. But what I find mind boggling is how selective we can be with our memories. Has the world forgotten the HUGE benefical impacts organized religion has had on the world. The development of empires, the rescue of legions of impoverished and diseased people, the asylum granted to political refugees throughout history. Not to mention the heavy influence in the development and sustinence of the American and British nations and their rise to power. The work of missionaries all over the globe, going into the most remote areas of the world bringing foods, supplies and medicine to the needy. Wars which we celebrate like the American Revolution and WWII were all lead by the moral and ethical arm of organized religion. Need I go on? The good most certainly out weighs the bad. Do the math.