Witwatersrand gold rush

In 1886, prospectors found gold-bearing rock on the ridge called the Witwatersrand, in the Boer-ruled South African Republic (Transvaal). Unlike earlier gold finds, the gold lay in layers of ore deep underground and needed heavy investment and technology to mine. Within months, a mining camp grew into Johannesburg. In time the Witwatersrand became the largest gold-producing region in history, with estimates that it yielded about 40 percent of all the gold ever mined.¹³

The discovery transformed the region. Diamond fortunes from Kimberley, such as those of Cecil Rhodes, flowed into the Rand, and foreign mining houses moved in. The mines recruited migrant African workers, housed in compounds, under pass rules and low pay that later became a model for apartheid labor. The Transvaal's Boer government taxed the industry and refused full rights to the foreign Uitlanders. This dispute led to the Jameson Raid of 1895 and the South African War of 1899 to 1902, and it made South Africa the economic engine of southern Africa.²³⁵

Johannesburg grew with extraordinary speed. By the mid-1890s it had well over 100,000 inhabitants, among them foreign miners, engineers and financiers, and a large Black migrant workforce housed in compounds and townships. The Rand's wealth gave the Transvaal government the means to modernize its state, but it also made the republic a target of imperial ambition.³