Stephen Hawking passed away in March 2018. Since then, many of his warnings about the future of humanity have been proven right.
Over the past eight years, we’ve faced severe challenges. Climate change has rapidly escalated. Artificial intelligence (AI) has advanced faster than anyone expected. The threat of asteroids now looms larger. And global political stability has weakened. Hawking’s main point seems more urgent than ever: humanity needs to become a multi-planet species.
He argued that we shouldn’t wait centuries to expand beyond Earth. In our lifetime, he believed, we should establish a presence on other planets.
Hawking’s concerns were specific. He warned about climate change, nuclear warfare, pandemics, genetically modified viruses, asteroid impacts, and AI. He was especially worried about low-probability, high-impact events—risks that might not dominate the news cycle but could have catastrophic consequences.
In a 2017 speech, he said that creating effective AI could either be humankind’s greatest achievement or one of its biggest mistakes. In a later interview, he expressed concern that AI might fully replace humanity.
Regarding climate change, he cautioned that we might reach a tipping point where Earth could resemble Venus—extremely hot and inhospitable. Many mocked him at the time, but those warnings are now more relevant.
Fast forward to 2024, and climate change has reached alarming stages. For the first time, average global temperatures exceeded 1.5°C above pre-industrial levels. The worst years for heat have all occurred in the last decade. Moreover, atmospheric CO2 levels climbed to 422 parts per million, levels not seen in three million years.
When it comes to AI, a recent report highlighted that AI capabilities are advancing more quickly than safety measures can keep up. A clock tracking AI safety showed that the risk has intensified considerably since Hawking’s passing.
Politically, the hope of global cooperation on existential threats seems to have faded. Preparedness for pandemics has shrunk back to previous lows, and concerns about engineered pathogens are rising.
On a more positive note, NASA’s asteroid detection efforts have improved. Their 2022 mission demonstrated the ability to deflect asteroids, adding a layer of protection.
Overall, many of the risks Hawking identified have worsened. While he wasn’t predicting doom, he emphasized that stacking multiple risks while living on a single planet makes survival increasingly unlikely. His argument was straightforward: take any single risk alone, and we’re likely to survive. Combine them, and the odds of catastrophe grow slimmer by the year.
Just a few years ago, the idea of becoming a multi-planet species seemed quirky. Now, it’s seen differently. A growing number of researchers and experts have started to view this concept as a vital insurance policy for humanity’s survival.
If everything goes smoothly, having multiple colonies is a luxury. But in case of a major crisis, it could be the only way humanity endures.
Hawking recognized this earlier than most people. The data and trends since his passing support his argument. He might have urged even greater urgency, reiterating that time is short to become a true multi-planet species.
While we can’t ask him directly, his framework is clear. The challenges of Earth are mounting, and we can’t afford to ignore them.
The ongoing wobble of our “basket” is something we all need to acknowledge. Hawking’s legacy urges us to listen and act. As time rolls on, it’s crucial to start addressing these issues seriously.
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