But the period of the Revolution brought with it a great change of view in regard to the morality of slavery, and this change of idea produced great modifications in the law of slavery, all of which tended not only toward an improvement of the condition of the slave, but also toward the ultimate extinction of slavery. When we regard the Revolution of the colonies against the motherland from the point of view of the present, we can easily see that its purpose was very different from that of the French Revolution. What it really sought and accomplished was national independence against foreign rule. Those, however, who formulated the creed of the Revolution sought its justification in the doctrine of human rights rather than in that of national rights. The philosophy of the eighteenth century was a humanitarian outburst. Politically and legally it is summed up in the very misleading propositions that all men are born equal and are endowed with freedom, and that the people have the right to change or abolish existing government at their pleasure. Whatever we may think of these doctrines now, our ancestors professed to believe in them, and there is no reason to doubt the sincerity of their profession, so far as their own consciousness went. They saw also the inconsistency of slavery with these doctrines, and quickly came to regard slavery as an evil which should be removed as soon as possible. {48} [Sidenote: First prohibition upon slave importation.] The Continental Congress took the first step in this direction. Two years before it declared independence it prohibited any further importation of slaves, and repeated the prohibition two years later. These acts are good evidence that, at the moment, the question of slavery was regarded as a matter of national concern. The Congress was, however, so occupied with the duties pertaining to the prosecution of the war, that it failed to go forward in this matter, as well as in many other matters of national concern; and when the Confederate Congress succeeded the Continental Congress, it did so upon the basis of a written constitution, or rather articles of union, which vested no powers whatsoever in it over the subject of slavery. [Sidenote: Abolition of slavery in the Northern Commonwealths after the beginning of the Revolution.] The separate colonies, now become "States" by the theory of the Articles of Confederation, took up the question. Massachusetts abolished slavery substantially by her constitution of 1780. Pennsylvania provided for gradual emancipation by a statute of the same year. Rhode Island, Connecticut, and New Hampshire followed the example of Pennsylvania. And New York, New Jersey, Delaware, Maryland, and Virginia forbade any further importation of slaves. [Sidenote: The Ordinance of 1787.]