Following German philosopher, Max Stirner, Philosophical Egoism shares with Natural Law theory the rejection of coercive authority, involuntary legislation, and the notion of a "social contract", but it also rejects what had been for over a century the philosophical basis for individualism: the notion of an individual's "right" to be free from coercion.
Egoists reject moral philosophy in general, and see anarchism not as rights-based, but as a pragmatic compromise in a system where each individual seeks only self-interest.
bkMarcus, A Brief Biography of Benjamin Tucker
[bk]