The Dominion of South Mouse Island is a gargantuan, socially progressive nation, ruled by President with an even hand, and notable for its museums and concert halls, daily referendums, and ubiquitous missile silos. The compassionate population of 11.031 billion Mice are fiercely patriotic and enjoy great social equality; they tend to view other, more capitalist countries as somewhat immoral and corrupt.

The enormous, socially-minded government juggles the competing demands of Healthcare, Education, and Environment. It meets to discuss matters of state in the capital city of Olive City. The average income tax rate is 90.2%, and even higher for the wealthy.

The frighteningly efficient Mouser economy, worth a remarkable 1,120 trillion dollars a year, is highly specialized and led by the Book Publishing industry, with major contributions from Information Technology and Tourism. State-owned companies are common. Average income is an impressive 101,575 dollars, and distributed extremely evenly, with practically no difference between the richest and poorest citizens.

Criminals and college students are taking an interest in the government's new weed-killing program, young girls aren't having a ball but they are enjoying themselves, many friends and relatives of President have been given ambassador jobs in tropical island nations, and the Mouser delegation to the World Assembly is having a hard time convincing people that international law will "pay for itself somehow...". Crime, especially youth-related, is totally unknown, thanks to a capable police force and progressive social policies in education and welfare. South Mouse Island's national animal is the Fox, which frolics freely in the nation's many lush forests.

South Mouse Island is ranked 5,196^th in the world and 17^th in Thaecia for Most Beautiful Environments, with 2,298.99 pounds of wildlife per square mile.