Eric Olson’s main contention is that when we refer to “I” we should be referring to one thing or perhaps no thing, but not multiple things. For any theory of identity one must avoid the thinking animal problem – positing more than one entity answering to the reference “I.” Olsen’s suggestion is that we are animals. Animalism is the view that each human being is numerically identical with an animal. An animal is a biological organism that lives by virtue of being a self-organizing “biological event” that maintains a complex internal structure. According to Olson, common theories fail to avoid falling fowl of the problem. Constitution, brain, part, bundle, soul…