"if men were angels, no government would be necessary. if angels were to govern men, neither external nor internal control on government would be necessary." -james madison, federalist 51

what does madison mean by "external control" and "internal control"? who/what was the influence?

external meaning federal government and internal meaning state government

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.