Is the evolution of animals and birds toward the human realm a result of automatic evolution or conscious effort?

According to Osho, evolution operates on two planes: bodies evolve automatically, but consciousness evolves through will. Even in animals and birds a faint volition participates in their ascent, while in humans evolution depends almost entirely on conscious choice. Thus, movement toward the human realm is not purely mechanical; it increasingly requires intentional participation, responsibility, and awareness, culminating in self-directed transformation exemplified by Buddhas and Mahaviras.