What evidence does McCullough use to support his argument that the graduating class is not special?

In his address, McCullough argues that the graduating class is not special by highlighting the common experiences and struggles shared by previous generations. He emphasizes that many graduates face challenges similar to those of their predecessors, suggesting that uniqueness is often overstated. Additionally, he points out that the qualities of hard work and perseverance are not exclusive to this class, but rather are universal traits that have defined successful individuals throughout history. By framing their experiences within this broader context, McCullough underscores the idea that every generation has its trials, making the current graduating class part of a larger, ongoing human narrative.