Marcus Buckingham and Curt Coffman open First, Break All the Rules by presenting the research foundation underlying their subsequent claims: an extensive Gallup dataset drawn from interviews with over a million employees and eighty thousand managers, analyzed specifically to identify what genuinely distinguishes the most effective managers from their less effective counterparts.

Why this research foundation matters:

• The sheer scale of this dataset — spanning numerous industries, company sizes, and organizational contexts — provides considerably more robust empirical grounding than the individual case studies or personal anecdote common in much management literature
• Buckingham and Coffman position their subsequent claims as emerging directly from this large-scale statistical analysis, rather than from theoretical assumption or a single successful executive's personal experience generalized without broader validation
• This research-first framing sets up the book's overall approach: presenting specific, statistically-validated findings about effective management practice, several of which directly challenge conventional management wisdom and intuition

This foundational research grounding sets up the book's title-defining central claim: that the most effective managers systematically "break" several widely-accepted conventional management rules, based on what their extensive research actually found correlated with genuine team performance and engagement.