"Throughout the last ten thousand years of history, human empires rose and fall, crumbling into pebbles and dust. Over the last two hundred thousand years, an even larger empire began its mighty and perilous ascent. From its home base in Africa, it established its presence everywhere throughout the globe, expanding endlessly in all directions, growing exponentially in numbers, colonizing land, other species, and entire peoples. Insatiable in its consumption of natural resources, addicted to growth, it left death, extinction, and destruction everywhere in its wake. This vast conglomerate was not the Persian, Greek, Roman, Mayan, Ottoman, English, or American empires, but the consequence and aggregate of all particular empires and unsustainable hierarchical societies, namely, the human empire."