We may not be looking forward to the November election — the polls tell us that — but this is not a country that likes to look back. Yet at this fraught moment, it might be salubrious to look back — back, back, back, as the sportscaster Chris Berman might put it, to the 41st president and to the life lessons he would have taught us as a nation, if only we had listened.
We'll never reach agreement o…