Commonwealth of Nations
The Commonwealth comprises 53 countries, across all continents. The members have a combined population of 2.4 billion people, almost a third of the world population, of which 1.26 billion live in India, 220 million live in Pakistan and 94% live in Asia and Africa combined. After India, the next-largest Commonwealth countries by population are Pakistan (220 million ), Nigeria (170 million), Bangladesh (156 million), and the United Kingdom (65 million). Tuvalu is the smallest member, with about 10,000 people.
Commonwealth realm
In recent years, advocates have argued for free movement of citizens among a subset of the Commonwealth realms: the United Kingdom, Canada, Australia, and New Zealand, which they argue "share the same head of state, the same native language, [and] the same respect for the common law." Opinion on the prospect of the plan coming to fruition is mixed. British Eurosceptics (those critical of the European Union) have expressed a preference for a relationship "similar in nature and goals to the EU" between the same four countries: the CANZUK Union without repeating the "mistakes of Europe"—though this possibility has also been characterised as "difficult and in some ways far-fetched". Despite this, public opinion polling conducted by organisations such as CANZUK International and YouGov have indicated widespread support for free movement of goods and people across Canada, Australia, New Zealand and the United Kingdom, with support for the proposals ranging from between 58–64% in the United Kingdom, 70–72% in Australia, 75–77% in Canada and 81–82% in New Zealand.