A multidisciplinary summary of personal identity, the individual, and subjectivation in the fields of biology, psychology/sociology, philosophy, evolutionary biology, and blockchain technology. In short, there are no grounds for these concepts beyond their use as convenient human constructs. Philosopher Derek Parfit vociferously contested the notion of personal identity (Reasons and Persons), claiming that "personal identity is not required for the survival of the person." Hume, Derrida, Deleuze, and Simondon agree. What is especially interesting and relevant is the status of the individual and personal identity as we progress into new eras of digital reality, and the evolutionary biological case for personal identity in humans. Personal identity may have evolved to bring adaptive fitness to humans, but there is evidence that the adaptation may no longer be serving as well, and could be different in the future per the new connected world computing paradigm and blockchain technology.