The essentiality of evolution is the Nature of Nature which cannot be stopped. Evolution is meant to become more and more perfect for being in harmony with laws of Nature.
Cosmic evolution happens through four ages of time and space and their movement and they are 1. Satya Yug 2. Treta Yug 3. Dwapara Yug 4. Kaliyug .
There are four main elements of human personality that actually bring harmony with the Nature or the world. They are 1. Satyam (Truth) 2. Sauchihi (Cleanliness in terms of mind, body and intellect) 3. Tapa (Spiritual discipline) 4. Daya (kindness) .These are like four legs of human personality. These four ingredients were at their peak level, functioning well, when the world began its journey at Satya Yuga. They got weaker and weaker as the yugas changed. In the final yuga, which is the current span (kaliyuga), people totally get weak. The function of all those essential four legs are at their zero level at this point in time. So human consciousness totally gets disharmony with the laws of Nature, the governance system.
You can watch the following video to understand how the human consciousness evolves.
