In "Earning the Rockies: How Geography Shapes America's Role in the World," Robert D. Kaplan highlights Abraham Lincoln's remarkable journey to prominence. Lincoln's ascent is a testament to his ability to migrate, educate himself, and labor diligently. This combination of factors played a crucial role in shaping his character and capabilities, ultimately allowing him to rise to the highest political position in the United States.

The narrative emphasizes that Lincoln’s success was not merely a stroke of luck but a result of relentless effort and strategic movement through a diverse landscape. Kaplan suggests that this journey is emblematic of the broader American experience, where hard work and perseverance can lead to significant achievements, regardless of background or origin.