A gap divides modern ideas of genius from the sentimental conceptions of the 1760s and 1770s. Though talent was a common feature, musical genius for Rousseau and Diderot was integrally related to expression, affective identification with a community, and an orientation towards ‘the people’. Also important was ‘enthusiasm’, originally a type of religious inspiration fostered after 1700 within radical Protestant groups such as Count Zinzendorf’s Moravians, who radically challenged contemporary ideas of masculinity, sexuality and religious faith. Enthusiasm’s secularization with Goethe and Herder initiated the countercultural ‘period of genius’ (Genieperiode) later known as the Sturm und Drang. Its composers, such as J. M. Kraus, Neefe and Reichardt, lavished attention on popular, commercial forms such as German comic opera and ‘popular song’ (Volkslied) – priorities only challenged when the movement’s opponents such as J. N. Forkel tactically redefined ‘genius’ to centre it on technical mastery rather than inspiration and expression.