Pigou had just published the economics of welfare two years earlier. The tragedy of the commons would only be published in 1968. I wonder how much externalitie

Pigou had just published the economics of welfare two years earlier. The tragedy of the commons would only be published in 1968. I wonder how much externalities were a commonly known concept in 1922. Resource exhaustion of oil he got more right than club of Rome even in 1972.