Globally, most legal jurisdictions recognize the two traditional gender identities and social roles, man and woman, but tend to exclude any other gender identities and expressions. However, there are some countries which recognize, by law, a third gender. There is now a greater understanding of the breadth of variation outside the typical categories of "man" and "woman", and many self-descriptions are now entering the literature, including "pangender", "genderqueer", "polygender", and "agender". Medically and socially, the term "transsexualism" is being replaced with "gender incongruence" or "gender dysphoria", and terms such as "transgender people", "trans men", and "trans women" are replacing the category of transsexual people.