I disagree with the when to fight part, Sonny's downfall was his rash judgment which caused him to fly off the handle (at Carlo) instead of being careful and sending someone to get Carlo and bring him to Sonny.



Long as I remember The rain been coming down.
Clouds of Mystery pouring Confusion on the ground.
Good men through the ages, Trying to find the sun;
And I wonder, Still I wonder, Who'll stop the rain.