Man is neither villain nor hero; he is rather both villain and hero.

Martin Luther King, Jr. (1929-1968) American clergyman, civil rights leader, social activist, preacher

Strength to Love, ch. 11 “What Is Man?” (1963)
    (Source)

Describing a more realistic view of humanity neither in "the thesis of pessimistic materialism nor the antithesis of optimistic humanism."