And many of those ideas are quite old. People have been dealing with their own minds for quite some time, and the past had far fewer distractions from facing one’s self. Things like mindfulness, CBT, theory of mind, and most philosophy are built upon quite ancient traditions, observations, and beliefs.
How about: ancient people had brains that were physically similar to anyone modern, and sometimes they came up with one or two good ideas, but they were generally poorly informed and full of misconceptions by modern standards.
