Each person's natural right is determined not by sound reason but by desire and power. For it is not the case that all men are naturally determined to behave according to the rules and laws of reason
Gist of Idea
Natural rights are determined by desire and power, not by reason
Baruch de Spinoza (Tractatus Theologico-Politicus , 16.03)
Locke would have been horrified by this. It looks like hopeless unfounded optimism to claim a natural right to anything. Doomed prey can struggle all it likes, but its right to do so seems irrelevant. Yet we see self-evident injustice all the time.
Spinoza,Benedict de: 'Theological-Political Treatise', ed/tr. Israel,Jonathan [CUP 2007], p.196