gawk at the jewels and tour the castles that belong to the royal family. so the british monarchy probably pays for itself. but the real gain in monarchies might be broader. new research published in the journal social forces suggest that monarchies worldwide do well for the country in which they exist. a professor of management in sociology at the university of pennsylvania tracked the governments of 137 countries from 1900 to 2010. he found that monarchies offered unity in the face of internal conflict, a check on executive power and a check on tenure of executive office holders. he used statistical is analysis to conclude that monarchies tend to protect people's assets and that results in benefits of an additional $1,694 in gdp per capita. look at the wealthiest societies around the world. the country with the highest per capita is luxenberg.