Species extinction is an inevitable process  Species extinction is a part of the natural world: Within evolution species naturally go arise and later become extinct as they struggle to adapt to changing environments and competition with other species. This be regarded as a part of the 'survival of the fittest' which drives evolution. Most extinctions that have occurred did so naturally and without human intervention. It is, for example, estimated that 99.9% of all species that have ever lived are now extinct, and humans have existed at the same time as only a fraction of these species. [1] Therefore it cannot be claimed that species going extinct will somehow upset the delicate natural balance or destroy ecosystems. Ecologists and conservationists have in fact struggled to demonstrate the increased material benefits to humans of 'intact' wild systems over man-made ones such as farms and urban environments, which many species simply adapt to. [2] Therefore any claims that humans causing the extinction of other species are somehow acting 'un-naturally' or 'immorally' or that they are risking ecological collapse as a consequence are mistaken, as they fail to understand that extinction occurs as a natural fact and that ecosystems adapt accordingly. No other species acts to prevent species besides itself from becoming extinct, and therefore again allowing another species to die out is in no way 'un-natural.'  [1] Raup, David M. “Extinction: Bad Genes or Bad Luck?” W.W. Norton and Company. New York. 1991  [2] Jenkins, Martin. “Prospects for Biodiversity”. Science. 14 November 2003.