Had there been a computer in 1872... it would probably have predicted — Karl William Kapp

"They (social costs) are damages or diseconomies sustained by the economy in general, which under different institutional conditions could be avoided. [. . .] if these costs were inevitable under any kind of institutional arrangement they would not really present a special theoretical problem. [. . .] to reveal their origin, the study of social costs must always be an institutional analysis. Such an analysis raises inevitably the question of institutional reform and policy."

"Capitalism must be regarded as an economy of unpaid costs, ‘unpaid’ in so far as a substantial portion of the actual costs of production remains unaccounted for in entrepreneurial outlays; instead they are shifted to, and ultimately borne by, third persons or by the community as a whole."

"Social costs... are all direct and indirect losses sustained by third persons or the general public as a result of unrestrained economic activities."

"Whenever social costs are shifted onto economically and politically weaker sections of society without compensation, a redistribution of the costs of production, hence real income is involved."

"To ignore social costs because they require an evaluation by society... and to leave social losses out of account because they are external and non-economic in character, would be equivalent to attributing no or ‘zero’ value to all social damages which is no less arbitrary and subjective a judgement than any positive or negative evaluation of social costs."

"K. William Kapps book "The Social Costs of Private Enterprise" was one of the first economic treatise that called attention to the ecological and social external costs of the market economy. His book is considered one of the origins of and a foundation for ecological economics."