Accepting that the world has a beginning and an end leads to a dismissive view of poverty, pollution, warfare, and social classes. While everyone certainly has a right to their personal beliefs about life after death, Muslims, Christians, and Jews must focus on the life that we know and to root our faith in what we can see in front of us. The early church was so confident that Jesus was coming back soon that they ignored many important matters of ethics. We cannot afford to make that mistake.
Humanity is not inherently evil, or sinful, or broken. Creation has been groaning for billions of years so that we might evolve. Creation continues to groan as we continue to evolve into all that we can be.