As the populations keeps growing, we will keep moving away the lifestyle our minds and bodies are evolutionary suited for, causing more depression/discontent. So, we're going to have no choice but create stronger drugs, and ways to drown our discontent. That's why the entertainment industry will always be recession-free. Without iPhone games, movies, video games, etc, we'd all go crazy. We either need pointless distractions, or we need to fight to survive.