Jean-Paul Sartre was widely known as French philospher and generally considered as Existentialist. In one of his book titled "Theory of Human Nature." Sartre suggested that, when people look at us it shows or make us know that we are BEING OBSERVED, this results in us to have feelings or experience emotions that could be any of SHAME, EMBARRASSMENT or PRIDE.
To retain his support in the North without further alienating the South, he called for compromise. He promised he would not initiate force to maintain the Union or interfere with slavery in the states in which it already existed.