So you're saying the first money was essentially "social credit"? I don't disagree with the spirit of the argument, but your good-will credit in your community

So you're saying the first money was essentially "social credit"? I don't disagree with the spirit of the argument, but your good-will credit in your community doesn't have the properties we associate with currency such as fungibility and divisability. If they used a formalized series of IOUs that allowed for the long term planning of capital then I'd be more inclined to call it currency. But sounds like an interesting book, may have to give it a read.