Related concepts are the safety valve and successive frontiers. Chandler, Jr.
The second reason has to do with regional history. InTurner spoke at the Chicago World's Columbian Exposition, where millions of Americans had flocked to Chicago for this multi-month event to experience displays of new technologies, new products, and new tastes.
Other historians, who wanted to focus scholarship on minorities, especially Native Americans and Hispanics, started in the s to criticize the frontier thesis because it did not attempt to explain the evolution of those groups. Although almost totally ignored at the time, Turner's lecture eventually gained such wide distribution and influence that a contemporary scholar has called it "the single most influential piece of writing in the history of American history.
They argue that, "Frontier imagery motivates Fermilab physicists, and a rhetoric remarkably similar to that of Turner helped them secure support for their research.