Original sentence: The supporters of cosmopolitan democracy  argue that it is fundementaly different than any form of national or regional democracy, because in a Cosmopolitan Democracy, decisions are made by people influenced by them, while in Regional and National Democracies, decisions often influence people outside the constituency, which by-definition can not vote
Edited sentence: The supporters of cosmopolitan democracy  argue that it is fundamentally different than any form of national or regional democracy, because in a Cosmopolitan Democracy, decisions are made by people influenced by them, while in Regional and National Democracies, decisions often influence people outside the constituency, which by-definition can not vote