Joe Brewer argues that despite the need for a rigorous science of social change, entrenched institutions and human decision-making hinder effective interventions. He highlights the concept of hysteresis, explaining how irreversible changes in global systems and social structures create significant barriers to change, especially in the face of ecological crises. Brewer concludes that the timeframe required for building effective social change science is incompatible with the rapid and entrenched processes driving current global changes.