In Cry, the Beloved Country, how do the conditions of the hills of Natal contrast with the conditions of the valley below?

The contrast between the hills, where Jarvis lives at High Place, and the valley, where Stephen lives in Ndotsheni, is both stark and symbolic. The hills are lush and green, well nourished and watered naturally by life-giving rains. Here Jarvis lives, surrounded by bounty, a white man of wealth and power. Stephen's valley, however, is dry and barren. No rains replenish the earth; no crops can be grown. The land cannot support Stephen's people, and the young must leave their homes. Thus, "the tribe is broken," and the poverty of Ndotsheni is exchanged for the poverty of Johannesburg. The lushness of Jarvis' hills and the barren state of Stephen's valley symbolize the great divisions in South Africa: economic, cultural, and racial.