That there wouldn't be enough work for people, that there was a contradiction between people's health and the biosphere's health, these were confusions so ingrained in the era before the 20s, they're now hard to understand.
Que no iba a haber suficiente trabajo, que había una contradicción entre la salud de las personas y la salud de la biósfera eran confusiones tan arraigadas en la era anterior a los años 20, ahora es difícil de entender.