How many people in the world?

I came across this website, which you may be tempted to visit, that gives details about the world's human population.

We humans are the "elephant in the room" when looking at many world problems, from famine to war, to monumental destruction of habitat, including our own. Cutting the number of children being conceived for a couple of years might is a good and long-lasting solution?

People / Km2 - The UK is officially full so stay away!

I think a falling global population can be our only viable option for human continuance, but many  "professional" Demographers do not, citing population growth is needed to facilitate market growth, as if "growth" is good for the world as opposed to merely good for multi-nationals. Fewer "workers" mean more robots can be used, which can be switched off or on as demand varies; it means less is demanded from the Earth and we can proceed with more and more set-aside for re-wilding. 

Those who say we need more people to defend ourselves (war) forget that we could produce robot armies to our hearts content and virtually automate wars if we have the wealth to do so. I just don't see  continuous human population growth as being desirable in any way, as many in more enlightened populations are demonstrating by a "jaw-dropping" global fall in babies.