In this piece, Lori Gruen discusses the most pertinent ideas taking place in the philosophy of animal rights. After addressing and solidifying her critique of current opposition to the inherent rights of animals, Gruen addresses the implications and merits of current systems of thought on animals value such as rights, utilitarianism and sympathy. Drawing on seminal texts in this field, Gruen creates a coherent and concise summary of current thought and debate on animal rights.