Okay, so I am currently reading a book called 'Evolution and Healing' by Randolph Nesse and George Williams.

I always read the Preface first.

SO they begin by talking about the fact that Ageing has an evolutionary explanation. And they question why anxiety does not have a similiar explanation as well as disorders like Schizophrenia.

Okay so moving on from the Preface, Chapter 1 has the heading 'The Mystery Of Disease'.

And the first paragraph starts:

Why, in a body of such exquisite design, are there thousands flaws and frailties that make us vulnerable to disease?

The second sentence says: