As hedge fund grandma used to say

A truism at the commodities hedge fund I used to work at was the “the Saudis are always lying” along with “never be long a country’s currency if they have their own word for afternoon nap”

Related: GDP per capita increases with distance from the equator and it does so moving both North and South

Air conditioning was a most important invention for us, perhaps one of the signal inventions of history. It changed the nature of civilization by making development possible in the tropics. Without air conditioning you can work only in the cool early-morning hours or at dusk. The first thing I did upon becoming prime minister was to install air conditioners in buildings where the civil service worked. This was key to public efficiency.

–Lee Kuan Yew, Singapore’s founding father