Until a comparatively recent period the laws of England in force at the time of the independence of the American colonies, relating to married women, the mutual duties of husband and wife, their property rights and the care and custody of children, were everywhere in force in this country except in those states which were originally settled by other nations than the English. [Sidenote: Changes.] The agitation of the last fifty years, caused by the demand for equality in educational opportunities and in professional, business and trade relations, as well as for the legal and political recognition of women, has brought about great changes in these laws, until they are in many instances almost entirely superseded by statutory enactments more in accordance with the spirit of justice and in greater harmony with the requirements of a higher form of civilization. In many states they have reached a condition in which the legal status of husband and wife is nearly, if not wholly, one of equality. [Sidenote: Basis of statue law.] It must always be borne in mind, however, that the common law is the foundation upon which almost the entire structure of our American system of jurisprudence is based, although it is claimed that it has only been recognized by our courts so far as it has been "applicable to the habits and conditions of our society and in harmony with the genius, spirit and objects of our institutions." As it became apparent from time to time that it was not thus applicable, or where it failed to meet the requirements of the changed conditions of society the strictness of its rules was relaxed by giving to them a broader construction, or, when this could not be done, they were modified or entirely changed by statute. [Sidenote: Marriage] Marriage was regarded by the common law as a civil contract and might be entered into legally by a boy of fourteen or a girl of twelve years of age, provided they were under no legal disability to contract marriage. This was called the age of consent, or discretion, and a marriage contracted prior to this time was inchoate only, and might be repudiated by either party upon arriving at the legal age. If one of the parties was above and the other under the required age, the marriage might still be disaffirmed by either. If after reaching the age of consent the parties continued to live together as husband and wife, this would be regarded as an affirmance of the marriage. [Sidenote: What constitutes.]