I think substance abuse could be both a class conflict and a functional analysis. I say a class conflict because most people who do these drugs are all in the same class, or similar. Not to judge but most people I see doing drugs, doesn’t have much going for them. They work but they work to pay bills and of course, to buy more drugs. I feel like people are missing out on such a better life when they constantly waste money on drugs. A half-ounce of marijuana is about 100 dollars, on average that may last about a week, depends on how much you smoke. So a lot of the lower class people could increase their wealth if they stopped spending so much on drugs. There are a lot of high maintained, wealthier people who are involved in this issue as well