Is England a dictatorship?

Wow, a few tourists from Glascow, Scotland told me how lucky I was to live in America. They said England is ruled by the Queen and they still have 15th century laws ie. beheading for stealing. Is that true? WOW, that's unbelievable! I don't want to sound arrogant but things like these make me so proud to be an American. I am so thankful to my forefathers who fought for the freedom of America. We have freedom and rights that people in other nations can only FANTASIZE about. Not to mention a culture that is widespread and emulated in every country in the world. And a military ten times the size of the next strongest. We'll never realize this, but God has truly blessed us.