Mexico, in the past, was known for producing some very good stuff - Michoacan and Acapulco Gold were two of several strains that were available 35+ years ago, and at good prices - a nickel bag, for five bucks, usually contained a few decent joints' worth. This was very "happy" sativa - paranoia wasn't a characteristic of it, maybe because it was more natural and unrefined.

Nixon was responsible for destroying the trade - and thus the shitty Mexican stuff, the infamous brown bricks and other dirtweed, became the only Mexican to be brought across the border. The professional smugglers set their sights on Columbia and Jamaica for the majority of their supply.