From the ATTC/NIATx blog (emphasis mine):
Today public health leaders think using marijuana together with alcohol increases the risk for impaired driving. Tomorrow leaders of multinational corporations will think selling marijuana together with alcohol – and tobacco – increases the opportunity for enhanced profits.
One hundred and forty years ago the invention of machines for rolling tobacco cigarettes radically reduced production costs and prices. That triggered consolidation from regional companies to multinationals, and shifted tobacco consumption from cigars to cigarettes and from men to also women. Now the spread of legalization is radically reducing production costs and prices, rapidly increasing firm size, shifting the favored product forms, and shifting consumption from weekend to daily patterns of use.
I do not expect marijuana legalization to match the public health catastrophe wrought by the tobacco industry. But I expect the dynamic energy of the free market to exploit fully the profit potential of this new (to private industry) dependence-inducing intoxicant, and innovation will carry the markets and consumption to places we would have a hard time imagining today.