In "The Proud Tower: A Portrait of the World Before the War, 1890-1914," Barbara W. Tuchman explores the societal and political changes occurring during a pivotal era leading up to World War I. The book delves into various aspects of life at that time, examining the influences of heritage and personal traits on individuals who shaped the national identity. Through detailed narratives and historical analysis, Tuchman illustrates how these figures contributed to the collective conscience of their nations.

The quote, "He had become, through a combination of heritage and character, a keeper of the national conscience," emphasizes the significant role certain individuals played in guiding the moral and ideological framework of their countries. These "keepers" were not merely passive observers but active participants who influenced public sentiment and policy. Tuchman's portrayal highlights the complex interplay of history and individual agency, showcasing how the past informs national values and identity.