Is jury nullification the ultimate trump card? From what little I know about it, it seems that if enough people in a community knew about it, they could 100% control what crimes are punished in that community. On face value, that makes a sort of sense intuitively, but obviously it has to be balanced against crimes that are in principle clearly wrong, despite what a local community believes.
Cops, prosecutors, DAs, judges, mayors and governors all have varying authority to "control what crimes are punished", in addition to who gets punished and the severity of that punishment. In that context, it doesn't seem so strange for juries to have some authority too. All this latitude among different actors in the justice system just shows how having an incredibly vast number of "crimes" on the books guarantees l…
Note that a jury of your peers is rarely available. Instead, it's whoever didn't get out of jury service as weeded by competitive interests of the DA and defense. That might make a difference too.