Micro-aggressions, those subtle slights like a sarcastic or dogmatic (I am right you, are wrong) tone, an eye-roll, or a dismissive interruption, may appear trivial in isolation. But in practice, they can sting, chip away at trust, and quietly derail collaboration, leading to uncertainty and indecision.

I think I’ve worked out a key blind spot in Amy Edmondson’s thesis on psychological safety. Her definition works well in high-stakes error environments like hospitals or aviation. In those settings, people need to feel safe to admit mistakes without fear of blame. That’s essential — nobody should hide a surgical slip or a checklist error because they’re afraid of punishment. Edmondson’s framing covers that territory well.