A call for collective crisis leadership. Issue 4 (July 2020) - Ngwenya, Nobesuthu; Helfand, Rosalind; McNamara, Aylin; Cooper, Michelle; Espinosa, Paola; Flenley, Daniel; Steiner, Noa; Awoyemi, Stephen; Dicke, Iris; Musasa, Monipher; Sandbrook, Chris