The natural man is eager for expansion and liberty, and accustoms himself with difficulty to the severe restrictions which social necessities impose upon him. His nature is still that of a semi-nomadic animal, living as an autocrat with his family, possessed of a number of egoistic wants, and, wherever he goes, opposing the rights, liberties and desires of other men, who generally compel him to subordinate his desires to theirs. This is the true reason of this impotent cry of vexation and anger against the malice of others and the defectiveness of social organization. And yet this cry is absolutely necessary, in order that we may find and put in practice a social formula as tolerable as possible for the future. But, if we except the question of capital and labor, there is no domain in which social hindrance is so cruelly felt as in the sexual. What is human right? Apart from formally admitted distinctions we shall divide what is called right from the psychological and human point of view into two categories of ideas; _natural rights_ and _conventional rights_. =Natural Rights. Right of the Stronger.=--Natural right is quite a relative idea: the right to life and its conditions. But, as in this world, which is said to be created by a personal and perfect God, things are so amicably arranged that living creatures can only exist by devouring one another, the oldest effective natural right of every living being is precisely that of devouring others weaker than itself. This is the right of the stronger. Therefore, the absolute natural right is the right of the stronger. =Rights of Groups. Ants.=--These notions become altered, however, if we regard them from the point of view of _relative_ natural right. This does not concern all living beings, but only certain groups. The rights of groups are relative from a double point of view. On the one hand they give the group of individuals concerned the right of interfering with the right to life of other groups, even to extinction. On the other hand--and this is the better aspect of the rights of groups--they are completed by what are called the duties of each individual toward others of the same group, that is to say, the obligation to have regard for and even protect their rights equally as his own. The rights of a group include the social rights and duties in the limits of that group.