Concepts such as fairness, justice, and liberty have no application to individuals in the jungle.

In the jungle, the only thing that matters is surviving and producing offspring who also survive and produce offspring. In the jungle, the only thing that matters is what works. Whenever you catch yourself thinking about how life is unfair, recall this image of a female preying mantis eating the male who approached to copulate with her:

Source: File:Praying Mantis Sexual Cannibalism European-37.jpg, GNU Free Documentation License 1.2, via Wikimedia Commons