I will argue that it is a better option for humans not to accept the doctrine of animal rights, and I will offer three reasons to support this claim. First, animal rights can be a limit to human health progress. Second, there are alternatives to accepting animal rights. Finally, Animal Rights does not advocate animal control, which is important for sustaining the ecosystem. The second point will be discussed as an extension of the first point. In support of my first claim I will offer two reasons. Supporting animal rights would hinder both understanding diseases and preventing unexpected harmful effects of new treatments, and there are no alternative methods that can completely replace animal experiments. Accepting the doctrine of animal rights can lead to the extinction of native animals, and also cause negative effects on the environment. Another consequence of accepting the doctrine of animal rights is that humans will no longer be able to control foreign predators (pests) through trapping, hunting, fishing, and poisons. Many foreign animals have been introduced into different ecosystems throughout history and it is very likely that they have caused many extinctions of indigenous species. This occurs because they compete with native animals for habitat and food and sometimes introduce new diseases. Maintaining indigenous species and therefore biodiversity is important because animals depend on each other in a food web, and the extinction of one can result in many others following. For example, the introduction of possums to New Zealand in 1837 led to the extinction of many native bird species such as the wren, laughing owl and native thrush. Another reason is that animal extinction has negative effects on the environment. The diversity stability hypothesis states that biodiversity acts as a stabilizing factor in ecosystems, and therefore highly diverse ecosystems can act to reduce the impacts of changes in the environment (Thibaut, 2012). We probably, therefore, should not support human rights, since the elimination of pest control will most likely lead to the extinction of many indigenous species, and the resulting reduction in biodiversity will compromise its ability to buffer human-caused environmental changes, like climate change. Furthermore, since the reduction in biodiversity was caused primarily by humans, it is probably our responsibility to minimize the damage