sentences:  In the tradition of publications such as Chris Argyris, with whom he collaborated at Harvard, his research shows that a powerful lever for change is ‘when managers are aware of their own share of responsibility in situations which they happen to lament’.Such a call for awareness appears in his many publications on the management of change, strategic management, corporate identity and organizational learning.He has also carried out numerous consulting and training missions on these same themes both in France and abroad.