Regarding identitiy, Stafford Beer said:

"The search for the `it' has led farther and farther away from anything that common sense could call reality. The `it' of scholasticism is a mythological substance in which anything attested by the senses or testable by science inheres as a mere accident - its existence is a matter of faith. The `it' of rationalism is unrealistically schizophrenic, because it is uncompromising in its duality - extended substance and thinking substance. The `it' of empiricism is unrealistically insubstantial and ephemeral at the same time - esse est percipi is by no means the verdict of any experiencing human being. The `it' of Kant is the transcendental `thing-in-itself' - an untestable inference, an intellectual gewgaw. As to the `it' of science and technology in the twentieth century world their `it' is notified precisely by its survival in a real world. You cannot find it by analysis, because its categories may all have changed since you last looked. There is no need to postulate a mystical something which ensures the preservation of identity despite appearances. The very continuation is `it'."

This view is reflected today in process physics and work on autopoiesis.

human identity

Personal human identity is defined more by social systems and ethical traditions, especially gender.

See alleged and collective identity for dicussions relevant to large public wikis.