Marijuana is the Gateway Drug.

And Darwin is the Gateway Science.

First it's evolution. Then comes plate tectonics and the Big-Bang. Then comes Athiesm. Then comes self-loathing and misanthropy, which leads to elitism and superiority complexes. The resulting social ostracization leads to homoeroticism and other perversions. The insatiable demand for money to fund extravagances coupled with the sloth that accompanies the welfare check creates a visceral hatred of capitalism. Finally, the abuser is no longer able to feel for his country and multiculturalism takes over. The transformation is complete.

I've seen it happen again and again.