The end of the world is a grim topic, but according to Stephen Hawking, it may come sooner than we think. Hawking was one of the most celebrated scientists of the modern era, known for his groundbreaking research on black holes and relativity.

His bestselling book, A Brief History of Time, explored space, time, the future, and the existence of God. Despite being diagnosed with ALS at 21 and given only a few years to live, Hawking defied expectations and lived to 76, continuing his scientific work.

Beyond physics, Hawking warned about threats facing humanity. He frequently spoke about climate change, overpopulation, nuclear war, and the risks of rapidly advancing technology. His concerns were rooted in science, not fear.

In 2017, at the Tencent WE Summit, he warned that unchecked population growth and rising energy use could make Earth uninhabitable by 2600. He cautioned that exponential growth cannot continue indefinitely.

Hawking also warned about irreversible global warming, even comparing a worst-case Earth scenario to Venus. He stressed that global cooperation and renewable energy investment are essential to prevent catastrophe.

Artificial intelligence was another major concern. Hawking said that fully developed AI could surpass human intelligence and become uncontrollable. While AI can help solve disease and poverty, it also carries serious long-term risks.

He supported space exploration efforts like Breakthrough Starshot, which aims to reach Alpha Centauri. However, he believed technology must be guided responsibly rather than relied on as an escape plan.

Hawking also feared nuclear war, calling human aggression a dangerous trait in the modern world. Ultimately, he believed humanity still has choices. His warnings were not predictions of doom, but calls for responsibility, ethics, and global cooperation.