I saw a news channel run something on this recently and I think the best complaint I saw, and I agree with it, if we're on track to legalize marijuana - expunge their records so they can get jobs. Pardons are great but they don't complete the circuit.
I clearly have my own biases on this topic as well, ie. instrumental use of drugs for cognitive enhancement or better self-knowledge / depth psychology applications vs. addiction or trying to numb ones self out to reality are completely different things. The biggest achievement of the war on drugs was politically alienating and economically attacking minorities and counterculture groups (which some of Nixon's staff actually claimed was the primary purpose). The number of people who ended up in jail for facilitating people being able to put what they chose in their bodies vs. the number of people who they saved from jumping off of buildings thinking they could fly is probably somewhere between 100:1 and 1000:1, and that fits the original intent. We also had a pivotal role in turning Mexico into a narco state and I'm guessing a character like Pablo Escobar in Columbia also probably wouldn't have been needed if we'd practiced saner laws around these things.
That said I'm not a Biden or Harris fan for all sorts of reasons, nor am I much a fan of the Democrat party, but this seems like it's the one thing I could sort-of count on them to get right and it seems like Biden's still dragging his heals on legalization (something that's really, at least these days, enjoyed bipartisan support).
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