Thesis - What is a theme or thesis?

The following are universal themes or theses:

Causality (Cause-and-Effect)                               Limitation
Change                                                                Order
Continuity                                                           Patterns
Connections                                                        Power
Culture                                                                Quest
Diversity                                                              Relations
Energy                                                                 Scarcity
Environment                                                        Stability
Evolution                                                             Structure
Exploration                                                          Style
Heritage                                                               Survival
Interaction                                                           Systems
Interdependence                                                  Traditional
Justice                                                                 Truth/Reality
                                                                            Unity
                                                                            Values

For examples of what a thesis is, go to:  http://www.tc.umn.edu/~jewel001/CollegeWriting/ARGUE/Thesis/samples