What is the theme in The Life of Elizabeth I by Alison Weir?

Sovereignty is another theme in the book. The monarch had absolute, god-given sovereignty, and for anyone to challenge that god-given right was treason and very close to sin. Elizabeth was so conflicted about executing Mary Queen of Scots because she was an anointed sovereign, appointed by God to her post. If Mary was judged on earth by men and not God, it was a complete breakdown of the hierarchical system.