It is only in the past few hundred years that cannabis has made its way to the Americas. First, Hemp came to America in the 1600s along with settlers and pioneers, before being overtaken by the more psychoactive varieties in the late 1800s.
By the first half of the 20th century, however, the US began outlawing psychoactive cannabis (and hemp as a casualty along with it), for political, economic, and racially motivated reasons.
When the 1970s had arrived, even though hippie culture was booming at the time, most of the world had already followed in lockstep to outlaw cannabis in almost any form.
It wasn’t until around the 1990s, starting in California, that US states began revising their cannabis laws.
Now, in 2022 with a majority of US states legalizing cannabis to some degree, it seems almost inevitable that cannabis will, at least, become federally decriminalized in the US within the very near future.