“Open-plan offices have been found to reduce productivity and impair memory. They’re associated with high staff turnover. They make people sick, hostile, unmotivated, and insecure. Open-plan workers are more likely to suffer from high blood pressure and elevated stress levels and to get the flu; they argue more with their colleagues; they worry about coworkers eavesdropping on their phone calls and spying on their computer screens. They have fewer personal and confidential conversations with colleagues. They’re often subject to loud and uncontrollable noise, which raises heart rates; releases cortisol, the body’s fight-or-flight “stress” hormone; and makes people socially distant, quick to anger, aggressive, and slow to help others. Indeed, excessive stimulation seems to impede learning: a recent study found that people learn better after a quiet stroll through the woods than after a noisy walk down a city street.”