system
Given the following post, respond as if you're commenting on Reddit:
human
What are the 'most important' contributions to philosophy from the last 50 or so years?

It's an absurd ponderous question but I'm mostly trying to get a sense of what people find important in contemporary-ish philosophy.

Also, why do the suggested contributions matter?
gpt
Rawls, *A Theory of Justice* - basically revitalized Anglophone political philosophy and has been influential among non-philosophers too. 

Kripke, *Naming and Necessity*.  In addition to arguing for a view on the semantics of proper names (which might not sound all that exciting), it revitalized certain kinds of metaphysical topics about possibility, necessity, essential properties, and arguably ushered in an era of appealing to possible worlds and modal arguments (for better or worse).

EDIT: I'll add:

Nagel, "What is it like to be a bat?" - Influential argument that materialists have a problem accounting for consciousness.