Deep-brain stimulation has been reported to provide relief from

Deep-brain stimulation has been reported to provide relief from depression.

Deep brain stimulation (DBS) is a neurosurgical procedure used for the treatment of many diseases such as Parkinson's disease, essential tremor, epilepsy, obsessive–compulsive disorder, dystonia. It includes the placement of a medical device called a neurostimulator which sends electrical impulses, through electrodes, to specific targets in the brain.

It is good method to use for the treatment when disorder cannot be adequately controlled with medications, but it can be risky, e.g. because of the electrode misplacement.

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.

oxygen +1 most likely