Either humanity reaches Type 1, or all known life goes extinct. Earth is 4.5 billion years old. Life on Earth is 3.7 billion years old. In just ~0.5 billion years, the Sun’s growing luminosity will destroy the carbon cycle, and with it all complex life. In ~1 billion years, it will boil the oceans and sterilize the planet entirely. Life on Earth is in its final hours, doomed to the hellfire of an expanding Sun. Humanity is the only hope. We can engineer Earth's climate and extend its lifespan by billions of years. The Sun's expansion however, is unyielding. Eventually, we must shepherd life beyond the confines of its cradle. There is no contradiction between the flourishing of humanity and the flourishing of the biosphere. Our fates are one and the same.