In "It Can't Happen Here," Sinclair Lewis expresses a powerful ambition for all Americans to recognize their potential as a united race. He emphasizes the importance of understanding that, despite various differences such as wealth, knowledge, or ancestry, there exists an underlying connection among individuals. This bond is essential for fostering national unity, which Lewis believes should be celebrated by everyone.

Lewis highlights that these differences should not divide Americans but rather enhance their collective strength. The notion of brotherhood serves as a reminder that unity is vital for the nation's success. Ultimately, he urges readers to appreciate their shared identity and work together toward a brighter future, reinforcing the idea that together they can achieve greatness.