The Rogue Nation of Sans Underale is a mammoth, orderly nation, renowned for its smutty television, irreverence towards religion, and devotion to social welfare. The compassionate, cynical population of 7.023 billion Sans Underaleans are ruled with an iron fist by the dictatorship government, which ensures that no-one outside the party gets too rich. In their personal lives, however, citizens are relatively unoppressed; it remains to be seen whether this is because the government genuinely cares about its people, or if it hasn't gotten around to stamping out civil rights yet.

The government — a sprawling, bureaucracy-choked, well-organized morass — juggles the competing demands of Welfare, Education, and Healthcare. The average income tax rate is 74.0%, and even higher for the wealthy.

The large but inefficient Sans Underalean economy, worth 227 trillion caats a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. The industrial sector, which is quite specialized, is dominated by the Woodchip Exports industry, with significant contributions from Furniture Restoration, Uranium Mining, and Retail. Average income is 32,459 caats, and distributed extremely evenly, with little difference between the richest and poorest citizens.

Rubber stamp emojis are the new craze, public nudity is compulsory, same-sex marriages are increasingly common, and scientists regularly clone human beings for research purposes. Crime is totally unknown, thanks to a very well-funded police force and progressive social policies in education and welfare. Sans Underale's national animal is the cat, which frolics freely in the nation's many lush forests.

Sans Underale is ranked 317,213^th in the world and 2^nd in Aristokuvaa for Most Scientifically Advanced, scoring -90.71 on the Kurzweil Singularity Index.