At some level we are too many people. On the other hand, I like a lot of the benefits that accrue from that. If you want the population of the world to be even say 1,000,000,000 people then you're looking at a significant downturn in many things.

I happen to participate in fringe activities that under 0.01% of the population engage in, and that happen only in North America. Assuming even a population reduction to 200,000,000 in North America, that 0.01% becomes 20,000 people, which is a very small group to target when spread across an entire continent.

How many of your hobbies/activities/interests would be around if the population underwent severe decline?