To some degree, all of any species has the embodiment of their aura inside them. This is more a psycological/spiritual thing than anything physical, however (except in the case of the Raevan, of course). So to a degree, yes, all the humans of Veruulis have some kind of ambition, regardless of how big or small it may be as a whole. Additionally, auras help when working in the area that they are centered on. Humans, for example, are very capable in political areas and exceed in climbing chains of command if they give the energy. They can be a hindrance, however. As they were created to make the races fundamentally different, they tend to cause friction between races, and can even effect the behavior of the individuals (subtlety effecting wants and goals). So sometimes they can be as much a blessing as a curse. Hope that answers it, let me know if you need more clarification.