Most people think that weed just makes you sleepy and cause a loss of motivation but it depends on the strain.

Sativa can cause increased creativity and activity in an individual.

Weed is an anti-depressant, it can cure cancer, and can give the user restful sleep.

People would not try to legalize heroin and crack because first of all there is a big difference between weed and hard drugs like heroin. Heroin could never be legalized because it has no good effect and it cause tons of deaths. In contrast weed has never killed anyone directly and is only addictive to 1 out of 10 people.

Marijuana has never caused any overdoses/death, but tobacco kills around 6 million people on average a year.

If marijuana is legalized jails would be less overcrowded.