This chapter analyses the success of two women, both of whom recognised the power of social networks as a way of multiplying one’s chances of success. Using two case studies – the teacher, MP and humanitarian activist Leah Manning, and the poet and Jamaican feminist activist Una Marson – this chapter suggests that while social networks can help, they can also constrain when individuals within a network come up against the network’s opposing goals. The chapter examines a number of women’s interwar networks including the National Council of Women and the Women’s International League for Peace and Freedom. It describes Manning’s work as a radical teacher in a Cambridge poor school and her involvement in helping 4,000 Basque child refugees escape from Bilbao during the Spanish Civil War. This chapter also examines Marson’s editorship of The Keys paper, when she increased the number of black female voices in this important interwar publication.