Malthus was right, and we are proving it. It's sad that we haven't had the wisdom or will to limit population growth. When we went from hunter gatherers to farming, our path was set. That led to civilization which led to better technology which eventually reduced infant deaths and increased our life spans. And yet we still multiply too fast.
I doubt whether we will actually reach 11.2 billion. Starvation, disease and conflict will begin to take their toll before then. It may have already begun. We're pretty clever, but not clever enough to keep increasing in numbers forever.
Sorry to be so negative, but that's how it appears to me.