Part of the lesson is understanding how we got here.
The answer is, of course, liberal hyperindividualism. By that I don't mean "liberal institutions" or respect for the individual person especially in the face of collectivism, but an ideology of antisocial atomization of the self that thrusts the self into subjective godhood. Paradoxically, this makes people more susceptible to control in practice.
Now, ideological and political programs don't fully realize the consequences of their premises instantly. It can take years, decades, centuries for all the nasty errors to manifest and become so conspicuous that they cannot be ignored. The Enlightenment program in our case. And so, in this hyperindividualism, the social order - its layers, its concentric circles, its various rights and demands on the individual that precede the consent of the individual - is all reduced progressively to not only the consensual, but also the transactional. Social bonds and structures evaporate or become fluid and contingent merely on the transactional; commitment and duty are a prison. Consent as the highest and only moral law leads us to relativism, because if all that is needed is consent to make an act moral and good, then naturally what is morally good will vary from person to person, and even minute to minute for a given person. On top of that, consent can be attained through manipulation and power, and so now individuals joust for power to manufacture consent in order to bless their exploitation of others.
The self cannot be limited in any way according to this program, and any residual limits are the lingering chains of some ancient past.
Perhaps most amusing is how so-called "countercultural" movements are anything but. These are typically just advancing the ideological program, not rejecting it. Contradictions between such movements and the status quo often come in the form of a tension between residual cultural features of an earlier age and the greater faithfulness to the trajectory of the program among the countercultural. Typically, conflicts are over power, not belief. And sometimes, the internal contradictions of the program lead to diverging programs that come into conflict.