what causes most wars
According the the Economist, the four most significant cause of war are, in descending order - ideological change, self - Determination, national control and resources.
Likewise the idea that most of the wars of history have been caused by religion is demonstrably false. The vast majority of wars have been conducted in the pursuit of profits or power, or waged for territory or tribal supremacy, even if religion has been caught up in those pursuits.