Vance has learned to voluntarily control the activation of his autonomic nervous system as part of the treatment for an anxiety disorder. this is an example of

In this case, the person had an anxiety disorder. The anxiety is in voluntary controlled by the autonomic nervous system in humans.

The biofeedback is a  mechanism, by which a person can control the working of involuntary system. This is done by the restriction of autonomic nervous system to specific stimuli.

In this case, the autonomic nervous system is trained to act according to the thoughts and the feelings.

Hence, the given situation is an example of Biofeedback.

you did not attach the discourse, but i assume it to be the discourse on the origin and basis of inequality among men (the original titile in french is: "discours sur l'origine et les fondements de l'inégalité parmi les hommes"), also know as "second discourse". in this discourse, jean-jacques rousseau emphasizes that private property is the basis of all inequalities.

therefore, what enabled the old regime to maintain as long as it did was private property.