High IQ.
However, people, in fact, are capable of the kind of violence needed to win against a modern military. They need the right motivators, leadership, and resources. If a state allows itself to become complacent in its "housekeeping," and lets its own corruption and authoritarianism become apparent to even the average citizen, then it will be a breeding ground for rebellion and insurrection.
A kind of revolution the OP is probably dreaming about, though, is just that - a dream. There is no unifying belief (or set of beliefs) - the kind strong enough to override a person's own survival instinct and sacrifice their lives - among so many disparate and insulated individuals strong enough to drive them towards the kind of revolution that would topple a militaristic, authoritarian government (like the one the US is becoming more and more every month).