dear "senior theorist",
u r not so smart.
general claim: political theorists today mostly rehash (extend existing frameworks)
evidence: Pettit took republicanism idea from Skinner
your counter evidence: Skinner said that Pettit was a good dude in 1998**
point still stands that Pettit is mostly an extension of Skinner's ORIGINAL ideas
**obvious caveat to this statement of support is that Skinner has every self-interested reason to have a famous colleague join the house that *he* built. Academic thank yous are also not that sincere. I know of a dozen times whne people have thanked colleagues whose guts they hate and whose scholarship then think even less of.