The Oppenheimer family has directed much of its philanthropic efforts towards preserving the heritage and cultural importance of the Southern African region, as well as to broader community upliftment in the areas of education, health, nature conservation and the arts. Nicky Oppenheimer and his son Jonathan Oppenheimer established the Brenthurst Foundation in 2005 as a way to contribute to the debate around strategies and policies for strengthening Africa's economic performance and enabling inclusive and sustainable development. The family has also long been involved in environmental and conservation issues. The Oppenheimer family partnered with De Beers to establish the Diamond Route in 2006 to maximise the potential of their properties for conservation, research and environmental awareness purposes. The Diamond Route links 8 sites across northern South Africa, stretching from Namaqualand on the west coast, to Kimberley, north to Tswalu in the Kalahari, and to the Brenthurst Gardens in Johannesburg, eastwards to Ezemvelo Nature Reserve and northwards to the Venetia Limpopo Nature Reserve in Limpopo Province.