Abortion law is legislation which pertains to the provision of abortion. Abortion has at times emerge as a controversial subject in various societies because of the moral and ethical issues that surround it, though other considerations, such as a state's pro- or antinatalist policies or questions of inheritance and patriarchy, also dictate abortion law and regulation. It has been regularly banned and otherwise limited, though abortions have continued to be commonplace in many areas where it is illegal. Almost 2/3 of the world’s women currently reside in countries where abortion may be obtained on request for a broad range of social, economic or personal reasons. Abortion laws vary widely by country, ranging from Chile, El Salvador, Nicaragua, Malta, and Vatican City, which ban the procedure entirely, to Canada, which places no restrictions on the provision of abortion whatsoever. Both supporters and opponents of legal abortion believe their position addresses a fundamental human right.