What is the central premise or core conflict that drives the narrative of Invincible?

The central premise of Invincible revolves around Mark Grayson's journey from a naive teenager developing superpowers to a seasoned hero, grappling with the immense responsibility and complex moral dilemmas that come with his abilities. The core conflict often stems from the tension between his human upbringing and his Viltrumite heritage, particularly after the shocking revelation about his father's true intentions, which sets up a multi-generational galactic struggle.