Preached at St John’s, Devizes
Readings – Romans 7: 15–25a; Matthew 11: 16-19, 25-30
“I do not do what I want, but I do the very thing I hate.”
I wonder how familiar you are with quantum computing?
I ask, because the last interesting episode of my recent trip to North America happened on the bus out to Montreal airport to catch my flight to Heathrow. There was conversation between a man in his fifties from the United States, in town to attend an industry conference for people working in quantum computing, and a woman of about twenty who was studying computer science at one of the local universities, who was asking him all sorts of intelligent questions.
It’s much more difficult to make quantum computers to work in practice than the digital computers we’re familiar with, the man explained, but experimental prototypes work increasingly well, and it’s possible that we’re within a few years of them becoming practical. There are many wonderful things they might make much easier, like finding new vaccines. He said, however, that the first thing that will happen is that every encryption scheme in the world will become obsolete overnight. Encryption means the codes that are used to keep your debit card payments secure, your e-mails private, and the suchlike. Even the encryption used by the world’s militaries and secret services will become worthless, he explained, possibly not too far in the future. The first thing that quantum computers will do, apparently, is to force all of these vital pieces of code to be rewritten using quantum computers.
The young woman was wide-eyed – and so was I. He smiled and shrugged and said, “It’s just like when the Iron Age arrived. Up until then, anyone who had bronze weapons and armour ruled the roost. Then all of a sudden they were obsolete and people needed steel. It’s just what human beings do; we advance.”
Nowadays we’re no longer talking about swords, but things like cluster munitions. The war in Ukraine is a reminder of what how terrible long conventional wars between well-equipped large countries are. We’d almost forgotten.
Necessity, as the old saying goes, is the mother of invention, and countries fighting for their survival have needs that are acute. So war drives technological advancement. The last big international war finished with the invention of nuclear weapons. For the first time, human beings had the power to destroy ourselves entirely. In the 17 months since Russia invaded Ukraine, there has already been a revolution in some military technologies, such as the use of drones.
