Note , Dr. Kroll says that we should let young bucks walk, he does not say that we should harvest the big young bucks and let the inferior young bucks survive. Remember also that Dr. Krolls research confirms that the avg. buck saved by AR will be smaller than the avg. 1.5 buck carried over without AR. Letting all young bucks walk will add to the genetic diversity ,but harvesting the best 1.5 buck and allowing the inferior 1.5 buck to survive will have a negative impact on the gene pool in the long term.