 When (around 1902) Peirce defined ethics as a normative science directly prior to logic, he also defined aesthetics as a normative science directly prior to ethics (since aesthetics studies goodness in and of itself, which may then be used to understand good action). This focus on the intrinsically good or admirable broadens the purview of aesthetics, which Peirce claims ‘has been handicapped by the definition of it as the theory of beauty’ (CP 2.199, 1902). Aesthetics is one of the least well worked-out areas of Peirce’s philosophy; nevertheless he says some intriguing and suggestive things about it. For instance he argues that the so-called summum bonum (ultimate good) really consists in the growth of ‘concrete reasonableness’ (CP 1.602; 1.615; 2.34; 5.121; 5.433), as the only phenomenon ‘whose admirableness is not due to an ulterior reason’ must be the furthering of Reason itself (CP 1.615, 1903). Recent further development of this framework includes (Kaag 2014; Gava 2014). 