What basis do we have for adopting retributivism and the Lex Talionis?
It
might seem that our real reason for adopting them would be to give the
victim (or, say, the victim's family) pleasure at experiencing the
suffering of the perpetrator.
But
there is a different basis: In committing a crime against you, a
perpetrator gives himself a higher status than you have. He does things
to you that it would not be legitimate for you to do to
him. But in paying back the perpetrator with an injury equivalent
to the one you suffered, the state would be bringing the perpetrator
back down. It would be reestablishing equality between the two of you.
The point of the punishment would be to force the perpetrator to see
that he in fact does not have a status higher than you do (e.g., to see
that he too is vulnerable to suffering) and to express a message to
society that persons have equal status. (See 122-125.)