I generally do resources and then population but I guess you could do basic animals (primitive resources) then move up to the more modern resources for more modern populations.
MDC
The Mer-races frequently get forgotten just to end up as a 'monster' but from a movement of peoples and resources point of view they are quite interesting.
Merfolk are forgotten.
Last night I went through and listed races from RM, HARP, D20 SRD, and PFSRD. I think this world should have mostly races that are in common with most of them, throwing out company specific named races, unless turned into a generic name. From the common core races down to pixies and vampires.
Here is what stuck out looking through lists of pure races.Human, Dwarf, Halfling, Elf (or different types), Gnome, Orc, Goblin, Lizardman, Troll, Ogre, Kobold, Hobgoblin, Gargoyle, Centaur (or different types), Merfolk (or different types), Catfolk, Lycan, Vampire, Satyr, Cyclop, Giant (or different types), Titan, Pixie, Nymph, Gnoll, Troglodyte, Winged People
HARP has a bunch of unique named races, which I would either generalize into common terms, or leave out. HARP GMs could add them in, as needed.
Hybrid races just seem like offspring here, not so much as communities of half-races.