> But nobody can argue against the fact that widespread enforcement efforts stepped up drastically in the late 60s and 70s I can certainly argue against that c

> But nobody can argue against the fact that widespread enforcement efforts stepped up drastically in the late 60s and 70s I can certainly argue against that claim, using your source. According to figure 2-1, the increase in incarceration rates clearly starts in 1974, after Nixon left office, and was increasing most quickly in the 80s and 90s. From 1969 to 1974, while Nixon was in office, the incarceration rate was actually lower than any time since the 1920s. At least, that's what your source says. I can't vouch for its accuracy.