Out of a hundred human beings fifty-one will be found in the long run on the side of the right, so far as they know it, and against the wrong. They will be organizers rather than disorganizers, helpers and not hinderers in the upward movement of the race.
 Oliver Wendell Holmes Sr., The Poet at the Breakfast-Table (1872). copy citation

Context

“The Master opened the volume, and, putting on his large round glasses, began reading, as authors love to read that love their books.
—The only good reason for believing in the stability of the moral order of things is to be found in the tolerable steadiness of human averages. Out of a hundred human beings fifty-one will be found in the long run on the side of the right, so far as they know it, and against the wrong. They will be organizers rather than disorganizers, helpers and not hinderers in the upward movement of the race. This is the main fact we have to depend on. The right hand of the great organism is a little stronger than the left, that is all.
Now and then we come across a left-handed man. So now and then we find a tribe or a generation, the subject of what we may call moral left-handedness, but that need not trouble us about our formula.” source