The Victorian Silurian World of Madame Vastra is a gargantuan, environmentally stunning nation, notable for its absence of drug laws and spontaneously combusting cars. The hard-nosed, hard-working, democratic population of 23.553 billion Silurians 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 large, liberal, pro-business, outspoken government juggles the competing demands of Defense, Public Transport, and Healthcare. Citizens pay a flat income tax of 31.0%.

The strong Silurian economy, worth 888 trillion Pounds a year, is quite specialized and led by the Beef-Based Agriculture industry, with major contributions from Pizza Delivery, Furniture Restoration, and Information Technology. Average income is 37,734 Pounds, but there is a vast disparity between incomes, with the richest 10% of citizens earning 256,551 per year while the poor average 2,027, a ratio of 126 to 1.

Crime is a serious problem. Madame Vastra's national animal is the Shadow, which frolics freely in the nation's many lush forests.

Madame Vastra is ranked 121,310^th in the world and 725^th in Europeia for Healthiest Citizens, with 1 bananas ingested per day.