If there is such a thing as philosophical progress, then why - unlike scientific progress - is it so invisible? Philosophical progress is invisible because it is incorporated into our points of view. What was torturously secured by complex argument comes widely shared intuition, so obvious that we forget its provenance.

I think one reason is that philosophers are more insecure to speak accessibly because non-philosophers are skeptical that philosophers have any special expertise. After all, all people - not just philosophers - have attitudes and points of view on various philosophical questions, and they rather resent being told that there are professionals who can think about these things better.

Are there experts, ethical experts, that's very offensive to all of us? Because it's part of our humanity to have a stake in these questions to feel that we ourselves know the difference between right and wrong. And then along come these experts, philosophers, claiming, you know, an expertise, a special training, a special skill, a special talent.

It's something that's very often said that philosophy, as opposed to science, never makes any progress.

Paraphrasing Plato's Republic: "Only people who have allowed themselves to be reformed by reality have it in themselves to reform their polis for the better."

Philosophy addresses, in a systematic and progress-making way, questions of deep concern to everyone.

What is remarkable about the Greeks - even pre-philosophically - is that despite the salience of religious rituals in their lives, when it came to the question of what it is that makes an individual human life worth living they didn't look to the immortals but rather approached the question in mortal terms. Their approaching the question of human mattering in human terms is the singularity that creates the conditions for philosophy in ancient Greece, most especially as these conditions were realized in the city-state of Athens.