You're quite right, i was in a bit of a rush writing that original comment so perhaps didn't elucidate enough. The point i tried to make was that the major damage that cannabis can do is to your ability to achieve, the consequence of which is probably far more widespread and damaging to our culture and advancement than any other ill-effect.

Now i'd be lying if i said i was a drop-out who hasn't achieved anything in the last ten years - i've done remarkably well, putting myself through university, graduating, getting a good job - but there's so much i want to do when i'm not working that i just put off because i get home, get stoned and suddenly nothing is boring - i could probably stare at a wall for hours without a hint of tedium. And therein lies the real point, that cannabis eliminates boredom. Without boredom people don't feel the need to push themselves, try new things, achieve what they want etc.

I've just been postulating on the issue of procrastination so much recently, this post really struck a chord. Also it was a strange coincidence that i wrote a poem on topic yesterday, as i literally never write poems; and i hoped someone might like the excerpt.