It seems to me that the unifying theme for the development of each wave of great courses has been inexpensive land that has been considered economically useless for anything else.
Linksland - useless for agriculture
Golden Age courses - built in the country (now in the city)
Current - very remote locations such as Sand Hills, Bandon Dunes, Cape Kidnappers and the like.
One could also add wetlands prior to environmental regulations, superfund sites, abandoned gravel pits, Lava in Hawaii and the desert.
Can this theory predict where great courses will be built in the future? Are there categories of land out there that are inexpensive, that have not been used for building golf courses, but someday will be?