Across very different contexts — military drilling, religious ritual, dance, group meditation — synchronized collective movement has a documented tendency to produce a specific altered psychological state: a felt sense of dissolving individual boundaries and merging into something larger than oneself. This isn't purely a metaphorical description; brain-imaging research on deep meditative states has found measurable changes in the specific brain regions responsible for maintaining a person's sense of their own body's physical boundaries, offering a neurological account of an experience described across many independent cultural and religious traditions.
The practical takeaway is that self-transcendent experience isn't limited to rare mystical events — it can be reliably triggered through ordinary, repeatable, physically synchronized group activity, which is part of why so many independently-evolved cultural traditions (military drill, religious ritual, communal dance) converge on the same basic mechanism.
Historian William McNeill recalled that during his 1941 basic training, hours of repetitive close-order marching with fellow recruits — originally just a way to fill time since the base lacked weapons — began producing an altered state marked by a powerful sense of well-being and feeling larger than himself. He later studied this pattern across history, concluding that synchronized marching, chanting, and dance have long served as tools for building intense group cohesion. Separately, neuroscientist Andrew Newberg scanned the brains of people in deep meditative states and found reduced activity specifically in the parietal-lobe regions responsible for maintaining a felt sense of the body's physical boundaries in space — offering a possible neurological basis for exactly the kind of self-dissolving, boundary-merging sensation McNeill described from his own very different, physically synchronized experience decades earlier.