We would like to show you a description here but the site won’t allow us. Existentialism, any of various philosophies, most influential in continental Europe from about 1930 to the mid-20th century, that have in common an interpretation of human existence in the world that stresses its concreteness and its problematic character. Get a comprehensive summary of existentialism. Explore its key tenets, influential proponents, and historical timelines in this insightful overview. Existentialism is well known for its critique of mass society and our tendency to conform to the levelled-down norms and expectations of the public. Rather than living our own lives, we tend to get pulled along by the crowd, doing what “they” do.