EXCESSIVE REPETITIOUS AND REDUNDANT
It has not been practical to try to eliminate duplications; because different essays represent slightly different perspectives on the same reality, or on intimately related realities.
Attempts to edit-out duplications --- might slip into the elimination of valid insights which were the most threatening/embarrassing to the writer/editor.
Essays which were written as much as three years apart have been discovered to be amazingly similar. Any serious commitment to eliminate such duplications could not be fulfilled without spending absurdly large amounts of time to find and evaluate how nearly identical two essays might be. There are about ONE-HUNDRED-MILLION possible pairings of essays to consider.