I'm Pro-Legalization of Marijuana because it
does not cause Lung cancer and my possibly
prevent types of it, as well, it is
not a gateway drug, not physically addictive (Although it IS mentally addictive, as much as food or video games can be). However, it can cause relapses
for those who have schizophrenia, so its obviously not for everyone and should be usually medically ideally, but recreationally too as long as its used carefully.
As far as the 'tearing apart families' thing, well, sometimes it does, sometimes it doesn't. I've seen alcohol tear people apart more than cannabis, and I've seen marijuana actually bring people together.
Marijuana has a huge stigma on it that has little truth, due to many years of anti-'drug', pro-tobacco propaganda. Its really tiring.