Gasoline

Gasoline in a glass jar

A map of Belgic Gaul in the first century BC, showing the relative position of the Nervii

01The Nervii reportedly forbade wine and merchants among themselves to keep their warriors undiluted by Roman goods or influence.
02Caesar describes grabbing a shield from an anonymous soldier and entering the front rank personally — he did not know the man's name.
03The Nervii, once 60,000 warriors strong by Caesar's count, were reduced to 500 fighting men and three chieftains after the battle at the Sabis.

Poster symbolizing the Ele Não Movement.

Thomas Midgley Jr. invented both leaded gasoline in 1921 and Freon in 1928 — one poisoned global blood lead levels for fifty years, one carved a hole in the ozone layer. One man, two planetary-scale mistakes.