The “Terrible Twos” are merely a marketing ploy by three year-olds, designed to throw parents off the track of how bad three year-olds behave. You see, by the time a child hits three they become very capable, in an absolute sense. By this I mean they know how things work: doors, locks, caps on spice bottles, plumbing fixtures, ladders, chain saws, lathes, Machiavellian interpersonal machinations, etc. They can do a lot with those skills, in an absolute sense. And they all have the same kind of outlook on law and order that one would expect of devotees of the Anarchist Cookbook. Do you have any idea of the harm an anarchist can do with spice bottle caps and a lathe? If you answer yes, you have probably been a parent of a three year-old at some point in your life.