Democrat Governor Jerry Brown opposed marijuana legalization during an interview on Meet the Press Sunday. By advertising and codifying the drug, Brown feared its acceptance and use could lead to a less alert and less competitive population.

The problem with anything, a certain amount is okay. But there is a tendency to go to extremes. And all of a sudden, if there's advertising and legitimacy, how many people can get stoned and still have a great state or a great nation? The world's pretty dangerous, very competitive. I think we need to stay alert, if not 24 hours a day, more than some of the potheads might be able to put together.

California was the first state to legalize medical marijuana back in 1996.

Brown said he will be closely watching Colorado and Washington, two states where recreational pot has been legalized.

Watch the interview here: