This MIT Technology Review piece by Peter Dizikes, 'When the Butterfly Effect Took Flight,' recounts Edward Lorenz’s discovery of chaos theory and the “butterfly effect” — how imperceptibly small differences in initial conditions can cascade into vastly different outcomes — and explains both the limits of long-term prediction and the outsized significance of small actions. Placed in PART 1: The Purposeful Investor under the chapter 'Your Worth And Power of the Collective,' the article is included to ground the book’s argument that individual choices matter: it bolsters the book’s emphasis on agency and the power of collective, intentional action by showing scientifically how modest interventions can scale to systemic impact, and it reminds investors to account for unpredictability, nonlinear risk, and the potential leverage of small, well-directed contributions.