It always seemed to me, that the colonial leaders of the Revolution, were, of necessity, more concerned over the unity of the colonies/states, than the philosophical foundations of what that unity would mean, after the Revolution. I think, 'Unity' was the priority, to the leaders, in the aggregate, of the Revolutionary leaders and framers of its national gov'ts.
If by philosophical foundation, you mean life, liberty, and the pursuit of happiness, or the more specific "no taxation without representation," they go hand in hand with that unity. The former motivated the latter. Similar motivations prevailed 1860-1865. These were the same objects that drove the barons to establish Magna Carta in 1215, and the parliamentarians to overthrow kings in 17th century England. The colonists were simply being very English. But could there be any other motivation for unity? It began as collective bargaining. They couldn't get anywhere with the British government individually. Upon declaring independence, they were small, petty nation-states that couldn't expect to win that independence (and secure those objectives) except via a united effort. Once they won it, they were still petty nation-states, and knowing how Europe loved to dominate (a trait they shared; it was, after all, ALL Indian land at one time), they knew they had to stay united to stay independent. Franklin wrote the original AoCs in 1775, at which time he specified the Union would last until reconciliation or, otherwise, perpetually. The Unionists of 1860-1865 (and any other period) could have borrowed directly from the unionists of 1765-1790: "In all our deliberations on this subject we kept steadily in our view, that which appears to us the greatest interest of every true American, the consolidation of our Union, in which is involved our prosperity, felicity, safety, perhaps our national existence." — Letter of Transmittal, Federal Convention to Congress, September 17, 1787
Of course, seeking life, liberty, and property rights and granting them to others are two different things. For instance, half the population was not even considered in all men are created equal. And enlightenment is a trickling stream, not a flood.