Dr. Michael Greger opens How Not to Die with his foundational, extensively-researched premise: a whole-food, plant-based diet can meaningfully help prevent, and in many documented cases actually reverse or manage, the leading causes of death and chronic disease in developed countries, positioning genuine dietary change as a significantly underutilized intervention compared to its demonstrated potential impact.

Greger's foundational argument:

• He argues that despite extensive research connecting dietary patterns to the leading causes of chronic disease and mortality, this research remains significantly underutilized in actual clinical practice and public health messaging, compared to pharmaceutical and surgical interventions that receive considerably more attention and resources
• Greger positions whole, minimally processed plant foods as consistently outperforming processed and animal-based foods across the extensive research literature he reviews throughout the book, building his case disease-by-disease across the book's systematic organizational structure
• This foundational premise, grounded in Greger's extensive research review methodology, sets up the book's overall structure: examining the specific dietary research connecting to each of the leading causes of death, followed by practical dietary guidance for applying this research

This foundational framing establishes the book's distinctive approach: an extensively cited, disease-by-disease systematic research review, distinguishing it from more anecdotal or single-study-focused nutrition writing.