Microstate

[1] Some recent attempts to define microstates have focused on identifying qualitative features that are linked to their size and population, such as partial delegation of their sovereignty to larger states, such as for international defense.

Other examples are small, isolated island states in the Pacific Ocean that gained independence from the European or Australasian powers: Nauru, Palau, and Tuvalu.

The smallest political entity recognized as a sovereign state is Vatican City, with fewer than 1,000 residents and an area of only 49 hectares (120 acres).

[1][5][6][7] According to some scholars the quantitative approach to defining microstates suffers from such problems as "inconsistency, arbitrariness, vagueness and inability to meaningfully isolate qualitatively distinct political units".

[5][8][9] Newer approaches have proposed looking at the behaviour or capacity to operate in the international arena in order to determine which states should deserve the microstate label.

In some cases, this impedes neutral and formal decision-making and instead leads to undemocratic political activity, such as clientelism, corruption, particularism and executive dominance.

[13] Some microstates with a history as British colony have implemented some aspects of a consensus political system, to adapt to their geographic features or societal make-up.

Those types of states, often labelled as "microstates," are usually located on small (usually disputed) territorial enclaves, generate limited economic activity founded on tourism and philatelic and numismatic sales, and are tolerated or ignored by the nations from which they claim to have seceded.

The Republic of Indian Stream, now the town of Pittsburg, New Hampshire, was a geographic anomaly that had been left unresolved by the Treaty of Paris, which ended the American Revolutionary War, and was claimed by both the United States and Canada.

The world's five smallest sovereign states by area, from largest to smallest: San Marino , Tuvalu , Nauru , Monaco , and Vatican City shown in the same scale for size comparison
Map of the smallest states in the world by population or land area.
Vatican City , the smallest independent country in Europe with 0.49 km 2 (120 acres), is also the smallest in the world
St. Kitts and Nevis in the Caribbean Sea , the smallest independent country in the Americas with 261 km 2 (101 sq mi).
Seychelles in the Indian Ocean , the smallest independent country in Africa with 459 km 2 (177 sq mi)
Maldives in the Indian Ocean , the smallest independent country in Asia with an area of 298 km 2 (115 sq mi)