Side note about quinine...
..." Quinine, for instance, cures malaria, but that quality allowed temperate-climate peoples to exploit tropical areas. " (such as the British)
From an interesting book called: Seeds of Change
[link|http://www.amazon.com/exec/obidos/tg/detail/-/0060914408/002-5561363-0537661?v=glance&s=books#product-details|http://www.amazon.co...s#product-details]