The identity and its related vocabulary was first present in
mailing lists of the 1980s. In the 1990s, online plural communities and their associated organizations emerged in greater abundance, and by 2001, online communities dedicated to plurality started to appear. Consensus to use
plurality as an umbrella term emerged in 2018 when more than 23,000 votes were cast across different support groups and platforms in support of the term. According to licensed counselor Emily Christensen, this "was, in itself, a historic moment for Plurals as they organized together in a way they never have previously". Some in the plural community practice
tulpamancy (borrowed from
Tibetan culture Plural communities continue to exist online through social media including blogging sites such as
LiveJournal,
Tumblr, and more recently,
TikTok,
Reddit,
YouTube, and
Discord servers. Headmates that identify as animals or other non-human entities may also identify as "
otherkin", a separate but overlapping community. Certain plural terminology is taken from
queer spaces, for example,
coming out of the closet. There is also a documented overlap between
transgender and plural identities; transgender headmates (different from the body's sex) are not uncommon. A somewhat considerable contingent of
autistic people identify as plural which, according to Christensen, may possibly be due to
neurodivergency being
traumatising in a neurotypically dominant society. According to a doctoral thesis written by a
Manchester Metropolitan University student, "systemhood" seems to have certain identifiable commonalities. For example, plurals who described themselves as "non-disordered" typically found systemhood to be soothing, while those with DID typically found it to be distressing. Also commonly reported was that a system's exhibited elaborate individualities that changed based on specific emotions or events. A different study on tulpamancers reported that they also
visualised an inner world, commonly calling it a "wonderland". Most systems interviewed in two separate studies reported that their headmates were aware of and communicated with each other. Christensen provided accounts of headmates marrying or procreating new headmates. == Mental health ==