The history of the late 19th and 20th centuries teaches us that there is something uniquely dangerous to world peace and political sanity during the two generations in which cultures pass from a poor, rural, and agricultural economy to a rich, urban, and industrial (or post-industrial) way of life.
La historia de finales del siglo XIX y del XX nos enseña que hay algo particularmente peligroso para la paz mundial y la salud política durante las dos generaciones en que las culturas pasan de ser economías pobres, rurales y agrícolas a tener un estilo de vida rico, urbano e industrial (o postindustrial).