When Dan was four, the family moved from Johannesburg to Kimberley, which was then under British control. The city had once been a huge diamond mining center, but the mines had closed and the town was in decline. However, the De Beers Consolidated Mines Company continued to have great influence. He attended a public school and learned English. During his childhood, he became aware of the ways that different people were treated based on their race, religion, economic status, and social status. In his autobiography Time and Again, he refers to the many classes of people in his community: "The Africans lived either in rooms in the back yards of their employers' houses or in sprawling, dusty, tatterdemalion 'locations'; the Cape Coloureds (South African name for people of mixed race) lived in their parts of town; the whites in theirs. Interspersed among these groups were smaller communities: Indians and Chinese among the non-whites, Jews and Greeks among the whites. As for the major division among the whites themselves, that between English-speaking and Afrikaans-speaking, or Briton and Boer.… All these peoples met in the streets, they did business with one another, but just about every aspect of their social life was severely segregated. To sit together in the same room with anyone of a darker skin than their own was a moral impossibility for most whites." He later recalled that many of his Jewish friends and acquaintances sympathized with the blacks in South Africa. He began to observe the ways that the government, churches, and the newspapers justified the ill treatment of blacks.