 Like Foot, Quinn believes that the key here is the distinction between negative and positive  rights.[15]  Doing harm involves the violation of negative rights; merely allowing harm involves the violation of positive rights. Since negative rights are more stringent than positive rights, doing harm is harder to justify than merely allowing harm (ceteris paribus). Quinn agrees with Foot that negative rights are intuitively stronger than positive rights. However, Quinn seeks to provide further argument by linking the precedence of negative rights over positive rights with the conditions for a person’s body to genuinely belong to him: 