What would happen if you were privy to every human existence?

Imagine that you were one of the first humans on Earth approximately 300,000 years ago. You live in Africa near Morocco today, and your life is not all that different from your human parents'. You hunt, make crude tools, gather food and supplies, and eventually die. However, this is only the start. because when you pass away, you travel back in time and become the second person to live. Even though you don't remember your previous life, your actions still have an impact on you. And after dying once more, you come back as the third person, then as the fourth, fifth, and so on, living the lives of every human being who has ever lived. These lives last almost 4 trillion years when arranged end to end. Your psyche does not carry the full weight of human history because you only remember the life you are currently living.

However, your future selves are still profoundly influenced by each of your lifetimes. Even though these significant figures in history represent only a small portion of your experience, your influence on the world can sometimes be seen. Instead, the majority of your life consists of mundane activities like eating, laughing, working, and worrying. You were a hunter-gatherer for about one tenth of your 4 trillion years. For 60%, you're an agrarian, creating instruments and procedures which you utilize over approximately 800 billion years of dealing with ranches. You spend 250 million years giving birth and 1.5 billion years having sex during your lifetime. Raising children, to whom you impart a variety of cultural values that shape the course of future generations, consumes 20 percent of your total existence. In some lives, invasion and imperialism destroy those cultures. In other circumstances, you endure hardship as your lands and loved ones are taken away. In more than 1% of lives, you're beset with jungle fever or smallpox, while, in others, you treat these circumstances — saving endless renditions of yourself. The average lifespan in the early days of humanity was fairly short. There are fewer lives to live, and the people closest to you are usually the only ones you can influence. However, as Earth's population grows and humans live longer on average, you begin to spend more time reliving the same action-packed decades.

One quarter of your existence began after 1750, and a full third of your existence began after 1200 CE. Society and technology begin to evolve at an unprecedented rate at this point. You create steam engines, set up factories, and generate electricity, all of which power the everyday machinery of your subsequent lives. You go through dramatic environmental destruction, the bloodiest wars in history, and scientific revolutions. Each new life lasts longer on average, but the pace of your existence keeps getting faster. Conversations that used to take months to develop are now completed in minutes. Your generations-old business ventures undergo radical transformation overnight. Even in your previous lives as kings and queens, you have access to luxuries that you could never have experienced. You finally reincarnate as the youngest person alive today after living over 100 billion lives.

However, your actions today have a greater impact than those of 99 percent of your previous lives, despite living through 300,000 years of human history. Contagions and treatments can be transported across an ocean in just a few hours using high-speed air travel. Additionally, the internet expands your personal sphere of influence worldwide, enabling you to collaborate with anyone, from any location, without ever having to leave your house. You have created tools in recent lives that can permanently alter future generations of living things by rewriting their genes. In addition, in this life, you might develop additional technologies that will make the world a safer, kinder, and more equitable place for many people in the future. Be that as it may, one indiscreet innovation could simply be horrendous. Climate change, nuclear weapons, lab leaks, and other existential threats have all increased humanity's risk of extinction. It is frighteningly simple to undo all of humanity's progress in this fast-paced, interconnected world or, potentially, to end all of your potential futures. It is impossible to predict what will transpire next. Your potential, on the other hand, is undeniable. So, how do you plan to spend your life? And what can you do to work toward a brighter future for your future generations?

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