In the end of the Crucible, what is it that is of utmost importance to John Proctor?

When Proctor screams that Salem has taken everything from
him, and that the least they can do is allow him to keep his name, there is much
present.  Proctor's evolution in character is steeped in the idea that an intolerant and
inauthentic social order takes people's reputations as its grist.  These social orders
take individuals' names and perceptions and destroys them.  When Proctor pleads for his
name, pleads for his reputation, and for everything else to be taken, it is his moment
to take a stand.  It is a moment in time where he recognizes that the limits of the
Salem social order will not be able to do much else, except to take people's names and
drag them through the mud.  In pleading for his reputation, Proctor understands the
reality of death, the reality of being branded as an "outsider," and what comes with
it.  Yet, he is defiant in his belief that his "name" is his own.  It is this that
becomes the most important element by the end of the play.