So marijuana came to be demonized in the same way as cocaine and heroin. Now organized crime took over and production increased and over the years so did the concentration of the products. It was much easier to transport, deliver and conceal concentrated drugs such as heroin and cocaine. Over the years a great deal of energy has been invested in "product development". Marijuana produced today comes in unlimited varieties and strengths. This has been the result of prohibition. No one would have invested the time and energy to cultivate so many strains without a market.