Not a fifth lens, but the point the whole engine exists to make: historians describe the same country differently because they weigh its causes differently.
The sharpest dispute is over what actually drove segregation and apartheid into being. The consensus and cultural readings treat racial ideology and rival nationalisms — Afrikaner and African — as forces with their own independent power, capable of overriding economic logic (apartheid’s later restrictions on Black urban labour, which frustrated employers, are cited as proof). The revisionist reading treats the same laws chiefly as instruments serving capital’s demand for cheap, controlled labour, with ideology as the justification rather than the cause. Both sides agree on the laws and their effects; they disagree on which was master and which was servant.
The 1910 Union of South Africa is read two ways for the same event. The cultural perspective reads it as a political reconciliation between Boer and Briton, a nation-building settlement after two brutal wars. The economic perspective reads the identical act as driven chiefly by the mining industry’s need for one unified labour, tariff, and railway regime across four colonies — politics arriving to formalise an economic integration already under way. Neither denies the other’s facts; they disagree about which pressure was decisive.
All four perspectives agree that the 1867 and 1886 mineral discoveries mark the great rupture that converted a marginal colonial society into an industrial, urbanised one built on racial labour hierarchy. They part sharply on why that hierarchy hardened specifically into apartheid after 1948 rather than easing with industrial modernisation, as some theorists once expected elsewhere — ideology, capital, competing nationalisms, and the entrenched geography of land dispossession each supply a different answer.
Reference status: every work cited is verified and correctly attributed — Leonard Thompson (updated by Lynn Berat), A History of South Africa, 4th ed. (2014) and The Political Mythology of Apartheid (1985); Hermann Giliomee & Bernard Mbenga, New History of South Africa (2007); Nigel Worden, The Making of Modern South Africa, 5th ed. (2012); Frederick A. Johnstone, Class, Race and Gold (1976); Shula Marks & Stanley Trapido (eds.), The Politics of Race, Class and Nationalism in Twentieth-Century South Africa (1987); Colin Bundy, The Rise and Fall of the South African Peasantry (1979); T. Dunbar Moodie, The Rise of Afrikanerdom (1975); Saul Dubow, Racial Segregation and the Origins of Apartheid in South Africa, 1919–36 (1989); Rob Turrell, Capital and Labour on the Kimberley Diamond Fields, 1871–1890 (1987); Francis Wilson, Labour in the South African Gold Mines 1911–1969 (1972); Nicoli Nattrass & Jeremy Seekings, Class, Race and Inequality in South Africa (2005). No cell rests on a single-author thesis presented as if uncontested; the Revisionist perspective’s account of racial capitalism, and the weight it gives economic interest over ideology, is itself an actively disputed reading within the historiography and is presented throughout as such, with the counter-argument stated inside each of its four cells.