The Libertarian Republic of Thenium is a colossal, efficient nation, remarkable for its sprawling nuclear power plants, ubiquitous missile silos, and suspicion of poets. The hard-nosed, hard-working, democratic population of 2.942 billion Theneans live in a state of perpetual fear, as a complete breakdown of social order has led to the rise of order through biker gangs.

The tiny, corrupt, pro-business, outspoken government is primarily concerned with Industry, although Administration, Defense, and Education are also considered important, while Welfare and Spirituality receive no funds. It meets to discuss matters of state in the capital city of Thenirion. Citizens pay a flat income tax of 4.3%.

The frighteningly efficient Thenean economy, worth 462 trillion Thims a year, is driven almost entirely by the private sector, which is broadly diversified and led by the Retail industry, with major contributions from Information Technology, Uranium Mining, and Woodchip Exports. Average income is an impressive 157,005 Thims, but there is an enormous disparity between incomes, with the richest 10% of citizens earning 872,397 per year while the poor average 14,164, a ratio of 61.6 to 1.

The nation's once beautiful countryside has turned brown as farmers spray potent pesticides, the entire entry for Thenium in the Hitchhiker's Guide to the World reads 'mostly harmless', the nation's police officers are famously miserable-looking, and elections have become procedural nightmares due to voters persistently rejecting candidates. Crime, especially youth-related, is pervasive, with the police force struggling against a lack of funding and a high mortality rate. Thenium's national animal is the rattlesnake, which is also the nation's favorite main course, and its national religion is Freedom.

Thenium is ranked 313,220^th in the world and 61^st in Capitalist Paradise for Longest Average Lifespans, with 29.74 years.