A Brief History of Time

Picked up Stephen Hawking's "A Brief History of Time" over the weekend and it was quite enjoyable. Was more familiar with the early parts from school and experience. Was quite happy to learn that Black Holes are not forever but gradually decay. Can't say I followed every argument in detail but got the gist of a lot of it. One question, well I have many, is why we haven't been able to harness the Casimir Effect for space travel, energy production etc. Suppose I should google it. Hawking is a brilliant physicist and knows what's going on in the field. However, physicists probably emphasize too much the explanatory power of physics for explaining the universe. I know because I am one too. But, that is not the whole story by any means. There are emergent properties of reality that seem to me to be outside of physics and are very important.