In "The Assault on Reason," Al Gore emphasizes the concept of the rule of reason as fundamental to the American political and social framework. He argues that this principle should guide decision-making, ensuring that actions are based on rational thought and evidence rather than emotion or unfounded beliefs. This approach promotes constructive debate and critical thinking within society.

Gore highlights the importance of upholding reason in public discourse, suggesting that it is essential for the health of democracy. He warns against the dangers of irrationality and manipulation that threaten to undermine rational governance, advocating for a revival of reasoned dialogue in addressing societal challenges.