Complex sentence: Her lifelong devotion to this question appears in all periods in her continuing discussion of the Platonic immoralists, Callicles and Thrasymachus, and of Nietzsche.
Split into simpler sentences: Her lifelong devotion to this question appears in all periods of her work. It may be found in her continuing discussion of the Platonic immoralists, Callicles and Thrasymachus, and of Nietzsche.