When One Bad Apple Spoils the Bunch: How Leaders Can Prevent Employee Toxicity from Spreading, by Jonathan H. Westover PhD

Abstract: This article examines how a single toxic employee can undermine an entire team's culture and performance, and why organizational leaders often hesitate to address such problems despite their damaging consequences. Drawing on research demonstrating how negative behaviors spread through social influence and conformity pressures, the authors outline the serious ramifications of inaction: decreased productivity, fractured communication, increased turnover, and potential legal risks. The article identifies common barriers to managerial intervention—including conflict avoidance, inadequate training, favoritism, legal concerns, and misplaced optimism—before presenting evidence-based strategies for effectively addressing problematic behaviors before they contaminate the broader workplace environment. Through a practical case study and actionable recommendations focused on swift intervention, fair evidence collection, behavior-focused feedback, support systems, clear expectations, and consistent follow-up, the article provides a framework for leaders to maintain healthy organizational cultures while treating all employees with dignity.