New tests have proven that MJ actually increased brain cell activity and there has been no proof that MJ causes cancer. The propaganda movie made about MJ in the 60s was financed by the alcohol companies. When legislators pushed to pass the bill to make MJ a dangerous drug and make it illegal they used the Mexican word for hemp which is marijuana which most people didn't know that they were the same plant. Hemp could take the place of thousands of products including cellophane. Before it was made illegal it was called the billion dollar crop which would have put hundreds of other companies out of business. It would have competed with the alcohol and tobacco companies and won, that's why it's illegal. Big money rules the world.