What is the plural possessive form of "people"?
"Our New Years celebration is for all people. It is a
"people" may be considered a plural form (of "person");
"peoples" may be a plural form of people when "people" is used to refer a variety of nationalities or races.
Formation of the possessive follows the normal rules:
#color(blue)("'s")#to nouns that do not end in #color(green)"s"#
#color(blue)("'")#(just an apostrophe) to nouns (especially plural forms) that end in #color(green)"s"#
[there is some regional variety here; in some places if the noun ends in "s" but is not plural,