Also, mankind has been on this planet for 2.5 million years and certainly cannot be considered an outsider by any definition. I agree with 9.3 in that there are many new ecosystems in existence BECAUSE of mankind. Remember the childhood puzzle that consisted of a closed square with one empty place and you had to shuffle the pieces around within the puzzle to get to the desired picture or solution? Such is the balance of life in any ecosystem. There is only room for so many thriving species of life and one form will move another to the side and that form will do the same to another. If mankind and ungulates are the desired inhabitants, then something else must move over to allow that progression to occur. Even mankind has been threatened in the past by species wanting to move US out of the way. Personally, I don't want to be the one to make the determination whether an entire species should be placed into extinction, which is soley the job of the Creator, BUT, I believe that since we are the sentient stewards and alpha predators on this planet, we can determine what goes where.