The Higgs boson is a massive elementary particle that was first predicted by Peter Higgs, Robert Brout and Francois Englert in the 1960s. It was finally discovered by scientists at the Large Hadron Collider (LHC) in 2012.

The Higgs boson is responsible for giving mass to other particles, including the W and Z bosons, which mediate the weak force. Without the Higgs boson, these particles would be massless, and the universe would be very different.

One of the things that the Higgs boson could potentially have done is to cause the universe to undergo a phase transition called the "electroweak symmetry breaking." This phase transition would have caused the universe to become very hot and dense, and it could have led to the formation of black holes that would have swallowed up everything in the universe.

However, the Higgs boson did not cause the electroweak symmetry breaking to happen at a high enough temperature. This is because the Higgs boson is not as heavy as it could have been. If the Higgs boson had been heavier, it would have caused the electroweak symmetry breaking to happen at a higher temperature, and the universe would have been destroyed.

The fact that the Higgs boson is not as heavy as it could have been is a mystery that physicists are still trying to solve. However, it is clear that the Higgs boson did not cause the universe to end, and it is therefore not a threat to the universe.