I found this story interesting, as it contributes to a non-materialist understanding of history. It suggests that the imagination and the imaginary have played more important roles in human development than material factors, such as 'the economy' or 'the environment'.
http://ngm.nationalgeographic.com/2011/06/gobekli-tepe/mann-text
This is an interview with the author:
http://www.electricpolitics.com/podcast/2011/06/gbekli_tepe_1.html