When Portugal decriminalized all drugs of abuse, they saw an initial spike in usage rates for most of them, and then a significant reduction in usage — to well

When Portugal decriminalized all drugs of abuse, they saw an initial spike in usage rates for most of them, and then a significant reduction in usage — to well below the original, criminalization-era rates — across the board. That is to say, a significant part of the cultural shift that's needed appears to be taking away the "Oooh, I'm being so bad!" stigma that criminalization incurs.