It is not that weed today is necessarily stronger, it is just that stronger weed is more common today than it was back in the day. The reason good weed is much more common today is because growing techniques, not the plant have evolved. However, in certain countries and in certain households in the United States during the 60's and 70's they had equally as good if not better weed than we have today. Even though this existed, the majority were getting 10 an ounce shwag