The Aryan family means they are civilized form of life. But we are utilizing in the matter of maintaining this body. Āhāra-nidrā-bhaya-maithunaṁ ca. We are utilizing this material, this developed body. The spirit soul has got the chance now to liberate himself. There is a process. By nature's way, the evolution is to give chance the spirit to get out of this material entanglement. So people are not giving importance.
Therefore sometimes we find there is overpopulation. Overpopulation. What is this overpopulation? Overpopulation means that just like from lower class a student is promoted, and when he comes to the final class, if he does not pass, then the class is overcrowded. Suppose from one, two, three, four, one comes to the tenth class. Tenth class is meant for final examination and go to the college. So if in the tenth class the students fail, then the tenth class becomes overpopulated. Similarly, the present civilization we sometimes find that there is overpopulation. Overpopulation means we are not being promoted to higher life. We are being blocked, and therefore nature's course is: there must be some pestilence; there must be some war to finish it.