The Dual Systems of Sol and Centauri is a colossal, socially progressive nation, ruled by President Rex Fivcho with an even hand, and renowned for its barren, inhospitable landscape and compulsory military service. The hard-working population of 3.173 billion Humans have some civil rights, but not too many, enjoy the freedom to spend their money however they like, to a point, and take part in free and open elections, although not too often.

The relatively small government juggles the competing demands of Defense, Welfare, and Education. It meets to discuss matters of state in the capital city of Earth. The average income tax rate is 11.6%.

The Human economy, worth 176 trillion Solcents a year, is fairly diversified and led by the Information Technology industry, with major contributions from Arms Manufacturing, Book Publishing, and Woodchip Exports. Average income is 55,640 Solcents, and evenly distributed, with the richest citizens earning only 4.2 times as much as the poorest.

A widely accepted trade policy is "tit-for-tat", corporate lobbying has been outlawed, prankster scientists legally change their names to silly pseudonyms before major discoveries, and starving citizens are offered nuclear pasta. Crime, especially youth-related, is almost non-existent. Sol and Centauri's national animal is the Phoenix, which can occasionally be seen dodging aircraft in the nation's cities, and its national religion is Immotianity.

Sol and Centauri is ranked 266,565^th in the world and 5^th in The Domana Universe for Highest Average Tax Rates, with 11.59 Effective Tax Rate.