Of course militarism is important in human history, but we can start to change ourmind set, now we are living in a peace era, we can start to think about other stufs than militar power, for example, Botswana should be in Civ. They are the most developed country in Africa, a region know by their small human development.
The last king of Botswana was also their first president, the most pacific transition to a democracy I ever heard about, have a movie about it.
Evie, witch tier should you put Botswana? Without a militar power they should fall down to tier B, but, as their great IDH and amazing transition from monarchy to democracy I will give they also a S tier.