Philosophia Christi

Volume 23, Issue 1, 2021

Symposium on Analyzing Doctrine

Or Abstractum
Idealism and Abstract Objects

George Berkeley is famous for the metaphysical principle esse is percipi or percipere (“to be is to be perceived or to be a perceiver”). Many Berkeleyan idealists take this principle to be incompatible with Platonic realism about abstract objects, and thus opt either for nominalism or divine conceptualism on which they are construed as divine ideas. In this paper, I argue that Berkeleyan idealism is consistent with a Platonic realism in which abstracta exist outside the divine mind. This allows the Berkeleyan to expand Berkeley’s principle to read: esse is percipi or percipere or abstractum.