Slavery existed for thousands of years, in all sorts of societies and all parts of the world. To imagine human social life without it required an extraordinary effort. Yet, from time to time, eccentrics emerged to oppose it, most of them arguing that slavery is a moral monstrosity and therefore people should get rid of it. Such advocates generally elicited reactions ranging from gentle amusement to harsh scorn and even violent assault.When people bothered to give reasons for opposing the proposed abolition, they advanced various ideas. Here are ten such ideas I have encountered in my reading.Slavery is natural. People differ, and we must expect that those who are superior in a certain way — for example, in intelligence, morality, knowledge, technological prowess, or

Congress and the president have adopted many critically important policies in great haste during brief periods of perceived national emergency. During the first “hundred days” of the Franklin D. Roosevelt administration in the spring of 1933, for example, the government abandoned the gold standard, enacted a system of wide-ranging controls, taxes, and subsidies in agriculture, and set in motion a plan to cartelize the nation’s manufacturing industries.