The Kingdom on the Trident of Tully of Riverrun is a titanic, efficient nation, ruled by Lord Paramount Benedict Tully with an iron fist, and remarkable for its zero percent divorce rate, absence of drug laws, and devotion to social welfare. The hard-working, cynical population of 15.423 billion Tullys are ruled by a mostly-benevolent dictator, who grants the populace the freedom to live their own lives but watches carefully for anyone to slip up.

The large, well-organized government juggles the competing demands of Welfare, Education, and Healthcare. It meets to discuss matters of state in the capital city of Riverrun. Citizens pay a flat income tax of 49.0%.

The very strong Tully economy, worth 916 trillion golden dragons a year, is broadly diversified and led by the Tourism industry, with major contributions from Retail, Information Technology, and Gambling. Average income is 59,427 golden dragons, but there is a significant disparity between incomes, with the richest 10% of citizens earning 172,481 per year while the poor average 16,211, a ratio of 10.6 to 1.

Most people attending churches are maintenance workers, citizens seem fixated on 105m x 45m rectangles, economics is a shrinking field, and a life spent suffering in silence is considered noble. Crime, especially youth-related, is almost non-existent, thanks to a capable police force and progressive social policies in education and welfare. Tully of Riverrun's national animal is the trout and its national religion is faith of the Seven.

Tully of Riverrun is ranked 126,976^th in the world and 2^nd in Riverrun for Most Scientifically Advanced, scoring 81.85 on the Kurzweil Singularity Index.