Question

Overarching ambition can lead to great leaders and their downfall. Substantiate your position in favour or in opposition to this statement, with two points each.

Answer 1

I agree that Overarching ambition can lead to the downfall of a great leader, too.
When one is too ambitious, ambition gets the better of a person. For example, in the poem Ozymandias, the king/ruler probably became too concerned with his power and immortality, and he became delusional that he too would perish.