Margaret Cavendish was a philosopher and writer active in mid-seventeenth century England. She is important not just as one of the first women active in philosophy in early modern age but as the expounder of an original scientific theory based on vitalism and materialism, by which she rejected the mechanical philosophy of Descartes and Hobbes and the experimental philosophy of Boyle and Hooke. Also, while not developing a theory of gender equality, she envisaged a form of emancipation of women based on intellectual activity as a way to social recognition and to the exercise of influence on society and politics.