INTRODUCTION. xlíü 
Sidering labour. Professor Schœnberg, one of the most dis- 
tmgmshed Economists of Germany, says, “Socialism has 
obliged Political Economy to recognize that it is not merely 
he natural science of human egoism, but that it should formu 
late a system of moral administration (Ethische Wirthschaft) 
lor the interests of society.” ' 
The fundamental error of most Socialists is not taking 
ufficient account of the fact that individual interest is th! 
ismsimm