Belief

I was reading about William James Will to Believe doctrine (basically Alma 32) and it brought to mind an old idea. A lot of things in life are true because we believe in them. For example, language: we all agree that a certain sound has a certain meaning and so it does have that meaning. It's all an arbitrary game, but once you get enough people to play it, it becomes more than that. Another example is money: our faith in the dollar bill is all that gives it any worth. Once people stop believing in it, you get the great depression.