Disobedience, Abstraction, and the Opposable Thumb (Tank Man)

What is the refusal to follow instructions or behave in accordance with a law, rule, or order regardless if it is inferred, conditional, corporeal, or compulsory, whether by an outside entity or self imposed?

This was built as a testament to an unknown man who, after months of protesting capped by a 3-day massacre where thousands of innocent men, women, and children were killed by their own government, had the audacity to break through the crowds and stand in front of a column of army tanks in mid victory procession. The media were all quarantined in the same area of the same hotel, which yielded one iconic image.