From Publisher's Blurb:
OPTIONAL RULES FOR “RACE-BASED” TALENT TREES
In addition to the Strong, Fast, Tough, Dedicated, Smart, and Charismatic character classes, Darwin’s World features a post-apocalyptic-specific class, the Post-Apocalyptic Hero, which is intended to represent a typical inhabitant of the radiated wasteland, one geared towards survival and scrounging.
The Post-Apocalyptic Hero does a good job of bringing out the flavor of a “wasteland survivor”, in large part due to the talent trees specific to that class. But this article is intended to delve even further into PA-specific talents, presenting an assortment of new talent trees based on the various player races of Darwin’s World.
Unlike typical talent trees, which are keyed to a given class, racial talent trees are available to any character of that race.