Adrian Gore transformed the South African medical insurance business. While working at South African insurer Liberty Life in the early 1990s his suggestions to build a new kind of medical insurer were turned down by Liberty's powerful founder (and former billionaire) Donald Gordon. In 1992, he got backing from the cofounder of Rand Merchant Bank, Laurie Dippenaar, to set up Momentum Health, which Rand Merchant Bank acquired. It was renamed Discovery Health and listed on the Johannesburg exchange in 1999