Heart of Darkness by Joseph Conrad (1899). In a novella with prose as lush and brooding as its jungle setting, Phillip Marlowe travels to the Belgian Congo to pilot a trading company’s steamship. There he witnesses the brutality of colonial exploitation, epitomized by Kurtz, an enigmatic white ivory trader. To understand evil, Marlowe seeks out Kurtz, whom he finds amongst the natives, dying. After Kurtz laments his own depravity through his final, anguished words—“The horror! The horror!”—Marlowe must decide what to tell his widow back home.