Reason requires discussion. Socrates knew this.
Discussion requires listening.
We no longer—in the political realm, in the classroom, in our personal lives, in our so-called social networking sites—have any interest in listening to anyone not ourselves.
Thus, no discussion, thus no possibility of reasoning, thus no possible improvement, as opposed to mere change, in our doxastic states.
We only yell at one another, and there is nothing social about this.