A thesis for The Hunger Games would depend on which aspect of the book you want to discuss. For example, if you wanted to show how government grows to oppress the individual, you might discuss the Capitol's reaction to District 13's rebellion; to keep the other Districts in line, they create gladiator-like games using children. One thesis might read: "Increasing government control over the individual leads to human-rights violations and institutionalized oppression."
Another theme is freedom of choice; although Katniss's sister is chosen for the Games, Katniss makes the deliberate choice to take her place, even though it means she might die. Similarly, at the end of the book, Katniss chooses to defy the unfairly changing rules and commit suicide with Peeta; although the Gamemakers relent and they survive, she shows that she is more willing to die on her own terms than be forced to kill for their entertainment. A good thesis for this topic might be: "Although freedom of choice is limited by laws, it empowers the individual to reject immoral controls and make decisions based on personal responsibility."
A thesis for the Hunger games would be the post apocolyptic culture of panem and how much it differs from our modern day culture and society! Hope that helps! Good luck!!!
Thesis #1 (Challenge of Change) / (Lessons of History)
The Hunger Games is a "challenge of change" in a world where politics has gone awry and bipartisanship cannot be met. The power struggle results in a Panam in which an elite group benefits at the expense of the ever-suppressed majority.
Thesis #2 (Making of Heroes)
Keeping in mind "the making of a hero," although the twelve districts are constantly reminded of "their place" in a hierarchy, heroes still shine.
Thesis #3 (Searching for Identity)
Throughout the trilogy, the main characters struggle to search for their purpose in life. Sometime they think they have found themselves but are again slapped into uncertainty.
Thesis #4 (Discovering the Truth)
Katniss is in constant search for the truth. Although she finds that some truths are painful, she also discovers that other "truths" are really disguises that need to be uncovered delicately.
Fighting for entertainment and control is the cruel personality of the People.