You're Gordon too? HAHA!
I agree with the other Gordon.
But also, I'm of the belief that the planet can handle more people.
I also think the population ebbs and flows like the tide.
Sometimes more, sometimes less.
With capitalism and the accelerating returns of technology,
The population will always be able to sustain itself.
Here's a video!
Also, as for cures against diseases,
I think ones like cancer,
which has billions of dollars being protected by the establishment
(Probably because they need it to keep hospitals going)
Some cures may be covered up.
With cloning nowadays we could surely cure many, many things.