How can blockchain disrupt the disrupters (Facebook, Google, Amazon etc)?
This paper by Professors Catalini (MIT) and Gans (University of Toronto), sets out some simple economics regarding blockchain technology.
It is easy to read and one of the more simple explanations of crypto-economics that I have read. The appendix also has a explanation of blockchain, proof of work consensus and examples of the type of transactions enabled by blockchain technology.
You can find the paper here.