Ethereum can be simple enough to understand from a bird’s-eye view: Decentralized applications powered by the same sort of crypto-economic guarantees that underpin Bitcoin. But once you’ve zoomed in to, say, a street-level view, things get complicated rapidly. Even assuming one has a strong grasp on proof-of-work, it’s not immediately…

Source and More information: The 1.x Files: GHOST in the Stack Machine

Author: Ethereum.org