Because we know that evil is real, we also have an idea that justice is desirable. Although we quibble about the details, we know that when "something wrong" happens, we want it to be fixed.
Every president, but with a mullet: https://twitter.com/hamcarless/status/1630765933768724483?s=46&t=3xqMF0h0MDBNNQaZ-_v8bw