Unconditional Election (Predestination), is the letter U in the acronym T.U.L.I.P that forms the basis of Calvinism.

The doctrine of Predestination asserts that some people are born already selected for salvation or damnation, which they cannot avoid even by good deeds in this life. For St. Augustine and John Calvin it is a divine mystery that God in His perfect justice makes the apparently gratuitous selection of the elect, with a parallel thought that He has made a similar selection of the damned  “…those whom in His justice He has predestined to punishment,” and “those whom in His mercy He has predestined to grace.”  –Augustine, Enchiridion c, p. 269

We can’t point fingers at John Calvin alone for this heretical teaching because he obtained it from Augustine’s writings.  But where did Augustine get it from?