Self-sufficient human colonies beyond Earth are necessary for humanity to survive into the distant future. Building them will not be easy, as many scientific and technological challenges still remain. Here we will focus on what is needed to create an offworld society that is capable of surviving and thriving on its own. We’ll use Mars […]
Humanity faces multiple existential threats that are planetary in scale. Currently, most threats are from nature, but in the near future we’re likely to create new risks. Most of these disasters could directly affect everyone on the Earth, but their destructive power cannot reach out across the void of space. A hypothetical independent human colony […]
Existential risks are bad. Stopping human extinction is good. Without getting too deep into philosophy, let’s talk about why we believe these things. Most people would agree that human life is a good thing, and that the death of a human is a bad thing. In case you don’t hold this belief, I recommend these […]
Existential risks are thorny problems. They generally can’t be solved by one person working alone. Success will almost certainly require deep cooperation among all countries. In fact, existential risks can be categorized according to how much cooperation is needed to avoid them. Mass cooperation without an explicit structure might work for some types of risk […]
One way to quantify the danger posed by an existential risk is to examine how much countries will need to cooperate in order to avoid it. Since successful avoidance of an existential risk can be considered a public good (something that benefits the well-being of all members of a society) we can borrow some terminology […]
If we can travel to other stars, there may one day be billions of times as many humans alive at one time as there are today. If we can travel beyond our galaxy there may one day be trillions of humans alive at one time for every one of us today. In case the sheer number of living humans wasn’t overwhelming enough, consider the fact that these civilizations could persist for many billions of years.
We live in a universe that is very hostile to life as we know it. The only habitable place we’ve found so far is the place we grew up: a thin layer atop the surface of the Earth. This is an incredibly small fraction of all volume in the known universe. Even if we make […]