Planetary core has an observed magnetic field, which is believed to be generated within its metallic core. Mercury's core occupies 85% of the planet's radius, making it the largest core relative to the size of the planet in the Solar System; this indicates that much of Mercury's surface may have been lost early in the Solar System's history. Mercury has a solid silicate crust and mantle overlying a solid iron sulfide outer core layer, followed by a deeper liquid core layer, and then a possible solid inner core making a third layer. The composition of Venus' core varies significantly depending on the
The Ego and Its Own is certainly true that we must first make a cause our own, egoistic cause, before we can do anything to further it. . . . [W]e are communists out of egoism also, and it is out of egoism that we wish to be human beings, not mere individuals... However, Marx and Engels would later collaborate on a lengthy criticism of Stirner's book in "The German Ideology" (1845, published 1932). The critique is a polemical tirade filled with ad hominem attacks and insults against Stirner (Marx calls him a "petty bourgeois individualist intellectual"). Stirner also had a lasting influence in the