‘Women have won their political independence. Now is the time for them to achieve their economic freedom too’. This was the great rallying cry of the pioneers who, in 1919, created the Women’s Engineering Society. Spearheaded by Katharine and Rachel Parsons, a powerful mother and daughter duo, and Caroline Haslett, whose mission was to liberate women from domestic drudgery, it was the world’s first professional organisation dedicated to the campaign for women’s rights. This book tells the stories of the women at the heart of this group – from their success in fanning the flames of a social revolution to their significant achievements in engineering and technology. It centres on the parallel but contrasting lives of the two main protagonists, Rachel Parsons and Caroline Haslett.