When talking about metal I alway bring up three bands; Black Sabbath, Slayer, and Megadeth.
"Back to the Start" starts with "Holy Wars..." about suicide bombing, "Sweating Bullets" about a guy suffering with dissociative identity disorder, "Kill the King" about corruption in government, to the end with "Prince of Darkness" which of course is about Lucifer; all of them bringing the heavy riffs, lyrics and all around style that makes Megadeth one of the kings of metal and showcasing their best songs over the years.
10/10