Hayagrīva: This is Darwin. Darwin's conception of evolution rests on the contention that there is a real genetic change from generation to generation. In other words, Darwin rejects the platonic igos. Igos is the Greek for idea, type or essence. There is no human igos, human type or essence. There are no fixed species. This is in contradistinction to the platonic idea that the species exist in essence or, as Kṛṣṇa says in Bhagavad-gītā, bījam, "I am the seed of all existences." Darwin would not recognize any bījam, or seed, particular type for any species. Rather, he sees shifting, evolving physical forms constantly changing.
Prabhupāda: The different forms are already there. Just like the form of monkeys also there, the form of man is also there, other animals, other birds, beasts. So he has no clear conception how the evolution is taking place, neither he has any idea about whose evolution. He simply takes account of the body. A body never evolves. It is the soul within the body—he evolves, transmigrates from one body to another. Just we see that a child becomes a boy. The..., if the child is dead, it no more evolves. So it is the soul that is concerned. The soul is within the body, and he desires and evolves. That is Vedic conception and that is life. For example, if a man is within an apartment, the man desires to change the apartment to another apartment, it does not mean that the apartment evolves, but the man desires a change, and he goes to different apartment. That is (indistinct). So Darwin has no such conception. He has described the idea of evolution from the Vedas in his own way.