Recently I've become quite interested in the history of cancer, diabetes, and heart disease. I'm interested in the following periods:

1) Pre-agricultural societies (10000+ years ago)
2) Pre-industrial revolution (100+ years ago)
3) Pre-fast food (50+ years ago)
4) Last 10 years

I realize that tracking these diseases in history is a difficult thing to do, since doctors in earlier eras might not have been able to make an accurate diagnosis. However, I would expect that even early physicians would take detailed notes that would allow modern physicians to determine general health trends of people in particular periods.

In particular, I'm interested attempting to identify major societal changes that correspond to changes in rates of these diseases over time.

I'm having a hard time finding good reading material on this topic. Can anyone recommend some books or websites as a starting point?

Thanks,
Adam