Reply #27: Not quite right. From your own link... [View All]

[Cerridwen]

"The Pure Food and Drug Act of 1906 required that any quantity of cannabis, as well as several other dangerous substances, be clearly marked on the label of any drug or food sold to the public." emphasis mine

...

"Not even the reformers claimed ... that cannabis was a problem of any major significance in the United States."

Although it seemed the racism and other bigotry so prevalent during the early part of the 20th century and which was more overt than now, contributed to the gradual demonization of marijuana and those who would partake, it didn't meet with a federal ban until 1937 and was much aided by business/conglomerate owners who stood most likely to lose.

It wasn't intended as a conspiracy theory so much as a quick look at "who benefits" (or benefitted) from this federal legislation.