In the early 1760s, the Madison family moved into a newly built house, which they named Montpelier. Madison succeeded Jefferson with a victory in the 1808 presidential election. After diplomatic protests and a trade embargo failed to end British attacks against American shipping, he led the United States into the War of 1812. Madison was never able to privately reconcile his Republican beliefs and his slave ownership. Madison is considered to be one of the most important Founding Fathers of the United States, and historians have generally ranked him as an above-average president. Madison grew up on a plantation that made use of slave labor and he viewed the institution as a necessary part of the Southern economy, though he was troubled by the instability of a society that depended on a large enslaved population. At the Philadelphia Convention, Madison favored an immediate end to the importation of slaves, though the final document barred Congress from interfering with the international slave trade until 1808. (The domestic trade in slaves was expressly permitted by the constitution.)