However, Carter's enormous weakness is his puritanical belief in his own righteousness. Rather than accept his shortcomings, he has engaged in a 26 year quest to vindicate himself. In the process, he has convinced himself that America is too corrupt and wicked to deserve a President as noble-minded and pure as he. Carter's mediocre Presidency would perhaps place him in the bottom third of all Presidents, but his nearly constant efforts to undermine the authority of every one of his successors, even at the price of damaging the security of the nation, cements his legacy as the WORST ex-President of all-time.