Do most aesthetic theorists in philosophy think that things beside art can be aesthetic (such as everyday life when not presented with art)? Or is that something only a few philosophers advocate (such as Dewey and Wittgenstein)?

HIstorically and today, most who practice aesthetics treat the aesthetic as involving more than works of art. The term "aesthetics" was introduced in the 19th cedntury to stand for sensory experience and only later came to be used in a way that was specific to works of art, but most of the important works in the field of aesthetics (like Kant's Critique of Judgment) think of (for example) treat the natural world in aesthetic terms. The definition of "aesthetic" is not air tight, however, but I suggest its most common usage denotes the emotive features of objects. An excellent book on the aesthetic in general, and works of art in particular, is Gary Iseminger's The Aesthetic Function of Art (Cornell University Press, 2004). While Dewey did a great job in highlighting the aesthetics of life outside the world of art (he was highly critical of some of the museum cultures of his day), some philosophers are swayed by what they see as non-aesthetic features of artwork. On this front, you might want to consider Noel Caroll's excellent book Beyond Aesthetics. On such matters, I am more with Iseminger and seek to defend an aesthetic account of art in the book Aesthetics: A Beginner's Guide (Oxford; OneWorld Press, 2011).

Most aestheticians make the distinction between aesthetics and philosophy of art, with "aesthetics" being the wider term and "philosophy of art" the narrower one. "Philosophy of art" is only the philosophy of works of art or art objects as they are unappealingly called these days. In other words, these philosophers accept that it is not only works of art to which the terms of aesthetic appraisal apply, such as "attractive", "unattractive", "lovely", not lovely", "unlovely", "majestic", "grubby", "oily", and on and on, without end. They also apply to the human face and the human form, to nature and parts of nature, including natural landscapes, the sea, etc. There is practically no word, I believe, that cannot one way or another be used as a term of aesthetic appraisal. The aesthetic is everywhere; a happy thought.

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