With the recent movie The Iron Lady, leadership scholars like me have seized the opportunity to reflect on the lessons of Margaret Thatcher’s life and career. In the film, we see an old and diminished Maggie flashing back to the pinnacle of her power. But, perhaps the most important and the least obvious lesson — for Thatcher herself, as well as for us — is about the midlife transition she failed to make; she was a victim, as many of us are, of her own success.