Birth tourism
Some countries do not allow their citizens to renounce their citizenship or only if the citizenship was acquired by birth there to non-citizen parents. In Argentina, Brazil, Ecuador, Peru, and Uruguay, voting is compulsory for citizens. In Bolivia, Brazil, Chile, Colombia, Cuba, Guatemala, Paraguay, and Venezuela, military service is mandatory.
Plurality voting
Plurality voting is used for local and/or national elections in 43 of the 193 countries that are members of the United Nations. Plurality voting is particularly prevalent in the United Kingdom and former British colonies, including the United States, Canada and India.