Nope. Not because of some visionary genius by the Founders. Not some remedy for small states vs. large states, or rural vs. urban.
Like just about everything else in the history of America, it was connected to race, and slavery.
To put it simply -
Slaves couldn't vote, but they were counted at 3/5ths apiece to determine congressional representation.
The Southern states were thus at a disadvantage if the popular vote were to determine the winner,
but they got a big boost by the use of electors representing the size of their congressional delegations, since the counting of the slaves increased the number of house representatives those states were entitled to.
The Southern slave states got their way and that's where the electoral college comes from.
Your lies mean nothing. Go away little girl.
See how angry they get when they are confronted with the truth.
The 3/5 in the Constitution was a compromise. The Southerners wanted to count slaves as a person while at the same time claiming they were property. Anti-slavery factions in the North said they couldn't have it both ways. Thence 3/5 was added to the Constitution as a compromise.
Southern states wanted slaves to be counted as property because of property taxes. As slaves aged they could use that to depreciate they property value. At the same time they wanted to count saves as people was that it gave them a higher population and therefore allowed them more seats in Congress.
Even with the 3/5 Compromise, Southern states still had an advantage in Congress until the Thirteen Amendment at the end of the Civil War, that made the Compromise obsolete.
Northern abolitionists also knew that with their higher population, counting a slave as a person, Southern states could dominate a Residential Election and could vote in pro-slavery Presidents.
The Electoral College was also a compromise to give smaller states a voice in a Presidential election, and to help combat the Southern states higher populations. The Founders knew that a minor number of high population states could dominate an election, and wanted the President elected by the entire country, not by 2 or 3 states alone.
(O'Connor, Sabato, and Yanus.
American Government: Roots and Reform. 12th ed. New York, NY: Pearson Education, Inc., 2015. Print.)
So, your statement s semi-accurate. Yes, the Electoral College and the 3/5 Compromise had something to do with slavery, but not about being pro-slavery as you infer.