The Republic of Mushroom Union is a massive, efficient nation, ruled by GoombaKoopa with a fair hand, and notable for its free-roaming dinosaurs, irreverence towards religion, and stringent health and safety legislation. The compassionate, democratic population of 1.744 billion Shroomers are free to do what they want with their own bodies, and vote for whomever they like in elections; if they go into business, however, they are regulated to within an inch of their lives.

The enormous, liberal, socially-minded, outspoken government juggles the competing demands of Administration, Education, and Welfare. It meets to discuss matters of state in the capital city of Mushroom Port. The average income tax rate is 93.0%, and even higher for the wealthy.

The frighteningly efficient Shroom economy, worth 209 trillion Nelphs a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. The industrial sector, which is highly specialized, is led by the Tourism industry, with major contributions from Information Technology and Book Publishing. Average income is an impressive 120,098 Nelphs, and distributed extremely evenly, with practically no difference between the richest and poorest citizens.

Orphans would rather live their life of luxury than be adopted by prospective parents, the government seeks peaceful forum with terrorists, the slowest students feel vaguely targeted by their Mendelian Inheritance coursework, and citizens with artificial limbs are forbidden to serve as beauty pageant judges. Crime, especially youth-related, is totally unknown. Mushroom Union's national animal is the Goomba, which frolics freely in the nation's many lush forests, and its national religion is Christianity.

Mushroom Union is ranked 307,183^rd in the world and 1,500^th in Europe for Largest Basket Weaving Sector, scoring -9.17 on the Hickory Productivity Index.