Marijuana impacts the aesthetic dimensions of human life such as art, nature, and especially the subtleties of human interaction? Have any philosophers talked about the effects of marijuana from a philosophical perspective?

Yes, there is a book just out that you might like, called Philosophy for Everyone: Cannabis:

http://www.amazon.com/Cannabis-Philosophy-Everyone-Talking-About/dp/1405...

The sub-title is quite fun: "What were we just talking about?"

That book, just published last year, should give you lots to consider.

Probably the most positive treatment of psychotropic drugs by a philosophically minded author is Aldous Huxley's The Doors of Perception.

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