The Underworld of Big Belly Empire is a colossal, orderly nation, ruled by Biggius Bellius with an iron fist, and remarkable for its parental licensing program, ubiquitous missile silos, and vat-grown people. The hard-nosed, hard-working, cynical, humorless population of 7.082 billion Mindless Sheep are kept under strict control by the oppressive government, which measures its success by the nation's GDP and refers to individual citizens as "human resources."

The relatively small, corrupt, moralistic, well-organized government prioritizes Defense, with Law & Order also on the agenda, while Welfare and Social Policy receive no funds. It meets to discuss matters of state in the capital city of Bellygrad. Citizens pay a flat income tax of 9.5%.

The all-consuming Big Belly Empirean economy, worth a remarkable 1,280 trillion Bellies a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. However, for those in the know, there is a large, well-organized, broadly diversified black market in Arms Manufacturing, Uranium Mining, Woodchip Exports, and Retail. The private sector mostly consists of enterprising ten-year-olds selling lemonade on the sidewalk, but the government is looking at stamping this out. Average income is an impressive 180,832 Bellies, but there is a large disparity between incomes, with the richest 10% of citizens earning 749,855 per year while the poor average 28,589, a ratio of 26.2 to 1.

Singing in public is only allowed if you are singing the praise of the Motherland, wood-framed catapults are ready to launch diseased corpses into besieged cities, the Hanging Gardens account for half of Bellygrad's water use, and small shoes often wash up on the beach. Crime, especially youth-related, is totally unknown, thanks to a capable police force. Big Belly Empire's national animal is the Hellhound, which teeters on the brink of extinction due to widespread deforestation, and its national religion is Oppression.

Big Belly Empire is ranked 102,541^st in the world and 3,431^st in Osiris for Most Primitive, scoring -19.5 on the Scary Big Number Scale.