Bundle theory

Bundle theory, originated by the 18th century Scottish philosopher David Hume, is the ontological theory about objecthood in which an object consists only of a collection (bundle) of properties, relations or tropes.

According to bundle theory, an object consists of its properties and nothing more; thus, there cannot be an object without properties and one cannot conceive of such an object. For example, when we think of an apple, we think of its properties: redness, roundness, being a type of fruit, etc. There is nothing above and beyond these properties; the apple is nothing more than the collection of its properties. In particular, there is no substance in which the properties are inherent.