Ervine tried, and, despite a number of setbacks, he proved that it was worth trying. He provided a classic example of political leadership, making the journey from violent Loyalism to democratic politics.
He may not have intended that it would be quoted as an epitaph, but he won't get a better one than his own view about the current situation:
"The next phase of the process is parliamentary democracy."Not just in Norn Irn David.
I met him a good few times over drinks, and - while it was hard to agree with everything he said - his passionate Socialism always shone though. He was good company as well.
Mick of Slugger has a good tribute with some excellent quotes from the man on Comment is Free. It's well worth the read (but don't look at the comments underneath, obviously).