Regan points out that we routinely ascribe inherent value, and thus the right to be treated with respect, to humans who are not rational, including infants and the severely mentally impaired.
In Ecological Economics value theory is separated into two types: Donor-type value and receiver-type value.
The Big Bang Theory | Theory of a Deadman | music theory | probability theory | theory | Theory of relativity | theory of relativity | Social learning theory | Game Theory (band) | Game Theory | Conspiracy theory | Music theory | K-theory | AP Music Theory | Piaget's theory of cognitive development | conspiracy theory | Theory of Relativity | Theory | Terror management theory | Invariant theory | information theory | graph theory | Galois theory | Einstein–Cartan theory | Conspiracy Theory with Jesse Ventura | Chaos theory | Terror Management Theory | representation theory | Recapitulation theory | Probability theory |
Between 1999 and 2004, David Laibman, a Marxist economist, published at least nine pieces dealing with the Temporal single-system interpretation (TSSI) of Marx's value theory.