We often say that one person can destroy a team. I sometimes wonder if they're simply revealing everything the organization no longer dares to look at.
The employee who monopolizes the conversation. The one who creates tension. The one who discourages others, who drives people to leave. But a question keeps coming back to me: why does a single person hold so much power? And above all... why does the organization let them?
What the research tells us
Roy Baumeister, in his work on negativity bias, shows that a negative experience leaves a deeper mark than several positive ones. A single person can thus take up a disproportionate place in a team's perception.
Elaine Hatfield, on emotional contagion, shows that cynicism or anger spread quickly through a group when they're neither named nor regulated. Amy Edmondson reminds us that a team gradually stops speaking up once it no longer feels safe to voice disagreement.
But another phenomenon strikes me as just as interesting: some organizations keep protecting employees whose behavior undermines the group, because they're deemed indispensable — rare expertise, a strategic project, excellent results.
Technical skill can become a form of immunity. Individual results can mask a considerable human cost. A culture isn't defined only by the behaviors it values. It's also defined by the ones it chooses to tolerate.
My take
For a long time, I heard this sentence: "This person is destroying the whole team." Looking back, I'm no longer sure that's the whole story. I've often wondered why a single person managed to take up so much space — because they're impressive, because they get excellent results... or because no one actually has the power to question the situation?
I've met managers who identified a concerning situation, documented it, raised the alarm — without being able to actually intervene, because the decision belonged to a level above them. Managers who watched their team burn out, tried to protect it, and yet felt powerless, because the person involved was deemed too strategic to let go.
So the organization hesitates. It postpones. And without always realizing it, it sends an extremely powerful message: behavior becomes negotiable once results look important enough.
Meanwhile, the whole team is watching, understanding, adjusting its own behavior accordingly. Trust erodes. People become more guarded. Sometimes, the best employees end up leaving.
To my mind, the real issue isn't only about toxic people. It's about the power organizations hand them — power that doesn't come only from their personality, but from everything the system accepts, postpones, or chooses not to address.
An organization doesn't reveal its culture only through the values it displays. It reveals it, above all, through the behaviors it accepts... and the ones it finally decides to address.
The power of toxic people — let's talk about it.
Sources & references: Roy F. Baumeister et al., Bad Is Stronger Than Good (negativity bias); Elaine Hatfield, John T. Cacioppo & Richard L. Rapson, Emotional Contagion; Amy Edmondson, The Fearless Organization; Bennett & Robinson, Counterproductive Work Behavior; Edgar H. Schein & Peter A. Schein, Organizational Culture and Leadership.