One morning in mid-March, at the beginning of the Kenyan rainy season, I drove to Kiambu, the ancestral homeland of Uhuru Kenyatta, the country’s newly elected president. Thirty minutes northeast of Nairobi I turned off a new six-lane highway and followed a country road across a fertile plateau. Coffee bushes glistened after a morning rainfall. Banana trees and plots of maize climbed the slopes of ravines. Mile after mile of new streetlamps bordered the road. “It is rare to see these lights in rural Kenya,” my companion, a reporter named Dominic Wabala, told me, attributing the local improvements in part to Kenyatta’s huge fortune.