Complex sentence: Mack noted that there was a worldwide history of visionary experiences (especially in that preindustrial societites) such as the vision quest.nly fairly recently in Western culture, notes Mack have these events been interpreted as aberations or as mental illness.
Split into simpler sentences: Mack noted that there was a worldwide history of visionary experiences--especially in that preindustrial societites. Only fairly recently in Western culture, notes Mack have these events been interpreted as aberations or as mental illness.