Calcified ideologies are tearing American culture apart. Even our great governing document, the U.S. Constitution, allows for amendments. What if we were quicker to make amendments to our own mental constitutions?

This quote comes from the Prologue of Think Again as Grant draws a parallel between the flexibility of the U.S. Constitution and the rigidity of individual belief systems. The comparison suggests that, just as the Constitution can be updated to reflect changing times and values, individuals should also be open to revising their own beliefs and mental frameworks. By being more willing to amend their “mental constitutions,” Grant implies that people could avoid the polarization and divisiveness that often result from entrenched ideologies. The desirability of intellectual flexibility and openness to new ideas underpins Grant’s entire work.