What are all the things that make a place geographically lucky? Who's lucky? Who isn't?

(From guns germs and steel)

Geographically speaking, (guns germs and steel) have nothing to do with geography, but what makes a place a good living environment would be could flat farm land for tending crops like in (china or India). Thats why china and India's populations are so much more greater then everyone else since they had lots of area for growing corn, rice and other farm foods to feed to the population. Also rivers, valleys and mountains to protect from invaders are also good geographical properties to sustain life or in other words (being lucky).