The Yowies are large apelike people who are deeply connected to nature. This has allowed them to become highly evolved spiritually and often preferring to leading secluded lives. Instead of building machines they prefer to develop psychic skills by which they can achieve the same aim.
The Yowies have a large starting advantage in Spirituality. They can use this to reach high levels in that field early in the game with its great advantages. Though they have the severe disadvantage of not being able to advance at all in Robotics.