On February 21, 2026, I delivered the keynote address at TEDxNortheasternU, titled Why Didn’t Someone Stop This? How Leaders Fall Into The Certainty Gap. This work explores a deceptively simple but urgent question: why do preventable failures continue to happen even when the risks are known? It centers on what I describe as the “certainty gap” — the space between what we know could go wrong and what we convince ourselves is unlikely to happen. Drawing from both food safety systems and my experience aboard a nuclear submarine, I examine how leaders respond to invisible threats. In both environments, the danger is not always visible, but the consequences are real. The work shows how delays, assumptions, and misplaced confidence can quietly shape decisions, often with serious outcomes.

The Challenge

At its core, this contribution addresses a leadership failure rather than a technical one. In many cases, organizations already have the data, the warnings, and the procedures needed to prevent harm. Yet failures still occur. Leaders may normalize risk over time, assume that an incident is unlikely, or delay action because nothing has gone wrong yet. The problem is not a lack of knowledge. It is a failure to act on what is already known. This work challenges the idea that compliance alone is enough and calls for a more proactive approach to leadership and decision-making.

The inspiration behind this work is both personal and professional. My time in the U.S. Navy submarine service taught me that invisible threats require constant vigilance and immediate response. That lesson became deeply personal in 1993, when my 16-month-old son died after contracting E. coli O157:H7. His death was preventable and exposed critical gaps in communication, accountability, and decision-making. That experience shaped my career and my focus. It drove me to understand why systems fail even when people care — and to ensure that “doing nothing” is recognized as a decision with real and lasting consequences.

Impact & Outcomes

The impact has been felt across industry, academia, and public dialogue. In practice, it has influenced how organizations think about risk and accountability, encouraging leaders to move beyond compliance toward active ownership of safety. In the classroom, it helps students connect regulatory frameworks to real-world outcomes, reinforcing the human consequences behind policy decisions. On a personal level, it has allowed me to turn loss into purpose, keeping the focus on preventing future harm rather than reacting to past failures. This event was also the culmination of several years of service as Faculty Advisor for Northeastern University’s TEDxNortheasternU program, and was made possible through collaboration with the student team behind TEDxNortheasternU.

“It drove me to understand why systems fail even when people care — and to ensure that ‘doing nothing’ is recognized as a decision with real and lasting consequences.”

Darin Detwiler

Connection to CPS

This work is directly aligned with my role as a professor of regulatory affairs, leadership, and the global economics of food and agriculture. It highlights the limits of regulation when leadership fails to act and reinforces the idea that compliance does not automatically result in safety. In teaching leadership, it challenges students to make decisions under uncertainty and to recognize their responsibility to act before harm occurs. I had previously delivered a TED Talk during the 2020 TEDxNortheasternU event, which became a virtual event due to the pandemic.

Connect with Darin on LinkedIn.