Dhaka, July 6 -- The world is more dangerous than it has been for decades, and families across the United Kingdom are feeling the impact. War has returned to Europe, pushing up energy bills at home. A closed strait 3,000 miles away drives up prices at the petrol pump. Cyber-attacks from the other side of the world force British firms to shut down overnight. And criminal smuggling gangs make billions breaching our borders.

Geopolitical instability, economic coercion, technological change and a ravaged climate are creating a perfect storm. Having dealt with these threats on the international stage this last year, it is very clear to me the rapid pace at which that storm is now gathering, and the real risks for the UK if we are not ready to...