Elon Musk is right about the threat of AI, but he’s dangerously wrong about why - Quartz

humans are already building a specific kind of AI ... systems that we construct and endow with legal, real-world power ... their own internal structures of rules and traditions, while humans perform fuzzy brain-based tasks specified by the system. The system as a whole can act with an appearance of purpose, intelligence, and values entirely distinct from anything exhibited by its human components.
All nations, corporations and organizations can be classified as this kind of AI... I’m not suggesting organizations are sentient, self-aware, or conscious, but simply that they show emergent, purpose-driven behavior equivalent to that of autonomous intelligent agents... can be entirely ruthless toward individuals... because these systems exist in a competitive environment.
Until recently ... human brains always ultimately made the decisions ... With the advent of machine learning, things have changed.