The Valiant Ascendancy of The Commonwealth of Arcadia is a gargantuan, socially progressive nation, ruled by Premier-Elect with a fair hand, and remarkable for its museums and concert halls, conspicuous electricity pylons, and punitive income tax rates. The compassionate, democratic, cheerful population of 29.171 billion Arcadians 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 government juggles the competing demands of Education, Environment, and Social Policy. It meets to discuss matters of state in the capital city of Arcadia Primaris. The average income tax rate is 98.9%.

The frighteningly efficient Commonwealth of Arcadian economy, worth a remarkable 5,560 trillion Gelts 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 led by the Book Publishing industry, with major contributions from Tourism, Information Technology, and Basket Weaving. Average income is an impressive 190,618 Gelts, and distributed extremely evenly, with practically no difference between the richest and poorest citizens.

Discrimination on the basis of sexual orientation is illegal, any citizen who cries is immediately assigned a psychiatrist, therapists can always squeeze in another house-call, and kindhearted Arcadians generously pay taxes for citizens of other countries. Crime is totally unknown, thanks to a capable police force and progressive social policies in education and welfare. The Commonwealth of Arcadia's national animal is the Shrike, which frolics freely in the nation's many lush forests.

The Commonwealth of Arcadia is ranked 1,520^th in the world and 2^nd in Eientei Gensokyo for Most Eco-Friendly Governments, scoring 13,656 on the Dolphin Recycling Awareness Index.