"Former British colonies" . "United States" . "Superpowers" . "Former confederations" . "G7 nations" . "Member states of NATO" . "Federal constitutional republics" . "English-speaking countries and territories" . "Countries in North America" . "1776 establishments in the United States" . "G20 nations" . . "Member states of the United Nations" . "Group of Eight nations" . "Laboratory biosecurity in the United States: Evolution and regulation" . "States and territories established in 1776" .