Under the scenario where the afterlife is eternal oblivion, Earth would likely see significant changes in its social and cultural fabric. The concept of life after death and the pursuit of eternal salvation or damnation would cease to exist, leading to a shift in religious beliefs and practices. Religious institutions and rituals that revolve around the afterlife, such as funerals, burial grounds, and commemorative ceremonies, might lose their significance or disappear altogether. The human quest for answers concerning life's purpose and what awaits them after death would become obsolete, as the concept of an afterlife no longer holds any meaning or hope. Without the concept of an afterlife, people might focus more on making the most of their lives on Earth. There would likely be an increased emphasis on secular values, such as personal and collective well-being, environmental conservation, and social justice. The absence of an afterlife-driven morality could lead to a reevaluation of ethical frameworks, with a heightened importance placed on empathy, compassion, and sustainability. The arts and literature, which have long explored the themes of death, the afterlife, and the human quest for meaning, might shift their focus towards celebrating the beauty and complexity of life itself. Artists and writers would explore different aspects of the human experience--love, joy, sorrow, and struggle--without the burden of contemplating an unknown and potentially everlasting existence after death. Existing scientific and technological advancements might continue to progress, as humanity invests heavily in improving life on Earth. Without the specter of an afterlife, the urgency to discover answers about the cosmos or transcendence might diminish, leading to a deeper focus on scientific exploration, technological innovation, and the practical betterment of society. In summary, in a world where the afterlife is eternal oblivion, Earth would experience a significant shift away from religious beliefs and practices. The absence of an afterlife-driven worldview could lead to a renewed focus on the here and now, with an emphasis on secular values, well-being, and the pursuit of knowledge and progress.