This perception isn’t always accurate, though John Gray: Is Human Progress an Illusion? This perception isn’t always accurate, though This perception isn’t always accurate, though This perception isn’t always accurate, though John Gray: Is Human Progress an Illusion? Il progresso culturale è un’illusione? This perception isn’t always accurate, though This perception isn’t always accurate, though John Gray: Is Human Progress an Illusion? John Gray: Is Human Progress an Illusion?