This is a bold claim on the glossy brochure of philosophy. I don't see evidence that philosophy has answered any of those questions or has the tools it claims to answer them.
Whenever I hear arguments about the contemporary relevance of philosophy, I ask myself "could these same arguments be applied to Alchemy and Astrology?" These were precursors to modern chemistry and astronomy, and their practitioners made many significant discoveries that we still use today. However, we have updated their methods significantly so though they are still known and read about, but not actively used.
I have not seen solid reasoning and evidence to suggest that philosophy is not in a similar situation.
Whenever I hear arguments about the contemporary relevance of philosophy, I ask myself "could these same arguments be applied to Alchemy and Astrology?" These were precursors to modern chemistry and astronomy, and their practitioners made many significant discoveries that we still use today. However, we have updated their methods significantly so though they are still known and read about, but not actively used.
I have not seen solid reasoning and evidence to suggest that philosophy is not in a similar situation.