Logical Possibilists Trying to Reduce Humanity to a Single Principle

The logical positivist was an early twentieth century group that were practically defined by their opposition to metaphysics. To them, rationality could have ever gotten us so far off track in the first place. Had they taken a more pluralistic approach, who knows what they could have done? The problem here, to berlin, was monism. They tried to reduce humanity to a single principle.