Where is the hard data that backs your claims of #1, 2, & 3. People cite your reasons as a strong arguement for keeping marijuana legal, but there is flaws in that.
#1 - There is no data that specifically proves that marijuana causes people to experiment with harder drugs. This argument is subjective to individual experince; therefore it cannot be used to support the prohibition of marijuana because there is more smokers who have not tried harder drugs than there is smokers who have.
#2 - This claim never existed until after 9-11 happened and governmental scare tactics used on the population to further it's own agenda. If anyone knows drugs and their nature, they'd know that marijuana money is chump change to harder, more expensive drugs. If a terrorist organization were to make money from the export of illegal drugs, they are more likely to sell cocaine, heroin, and/or MDMA (Ecstasy). Therefore, the likeliness of marijuana being a major source of income for terrorist organizations is very low.
#3 - Is connected to #1 and therefore, is invalid.

If we we're to go back to early human history, before the idea of "pretty" came about, history teaches us that women are more attracted to men who can demonstrate a protective and aggressive action. We can look to the animal kingdom today and see this in action. The male who is the strongest, the toughest, and more leader like, is the one who had the pick of the females.
We humans are nothing more than bi-pedal primates, still subject to our primal and natural animal instincts. If you remove all the amenities that society provides us, we would be left to our natural inclinations...and that is to say, that women would more attracted to the men who demonstrate fearlessness, protection, leadership and direction.