This BBC film made in a documentary style drama depicts the aftermath of a nuclear strike on the UK. It is approximately 45 minutes long and in black and white and was banned in the UK in 1965 when it was made as it was deemed too horrifying to broadcast on TV. It was not until 1985 that it was actually released.

A quote from the film that struck a chord with me was by a scientist who said

Technically and intellectually, we are living in an atomic age. Emotionally, we are still living in the Stone Age. The Aztecs on their feast days would sacrifice 20,000 men to their gods in the belief that this would keep the universe on its proper course. We feel superior to them.

I fully concur that to a large extent our collective consciousness has not kept up to pace with our technological advancements and that represents a serious danger.
The full documentary can be viewed on YouTube.com I highly recommend checking it out.