This is the fourth post in our series of remembrances on the late Susan Sell. Susan and I were both conducting research in Geneva in the summer of 2022, she was at the World Trade Organization, and I was working in the archives at the International Committee of the Red Cross. Our hotels were right next to each other, so we met up one night and walked along Lake Geneva into town looking for a place for dinner. As we sat down, Susan, in her inimitable way, scrunched up her face in both disgust and disbelief—the man next to us was chain smoking and blowing smoke our way. I chuckled. Susan was...