Frontmatter -- Contents -- List of authors -- 1 Number in the World's Languages: Configuring the variation space -- I Africa -- 2 Number in Eastern Dan -- 3 Number marking in Karko and Nilo-Saharan -- 4 Number in Tswana -- II Europe and Middle East -- 5 Number in Arabic -- 6 Number in Occitan -- 7 Number in Slovenian -- 8 Number in West Circassian -- III Northern Eurasia -- 9 Number in Ket (Yeniseian) -- 10 Number in Nganasan -- 11 Number in Nivkh -- IV Pacific and Australia -- 12 Number in Gooniyandi -- 13 Number in Indonesian -- 14 Number in Japonic Family -- 15 Number in the Languages of the Lower Sepik Family -- 16 Number in Marori -- V Americas -- 17 Number in the languages of South America -- 18 The category of number in Kakataibo (Panoan) -- 19 Grammatical simplexity: Number in Kiowa -- 20 Number in Mohawk (Iroquoian) -- VI Further perspectives on linguistic diversity -- 21 Contact languages: A survey -- 22 Number in Russian Sign Language -- 23 Number in grammar: results and perspectives -- Terms -- Languages and language families -- Authors