Archaeologists ask a lot of ‘why’ questions. The range of approaches available to present-day archaeologists is reflected in the diversity of contemporary archaeological theory. This diversity is a strength and will lead to new discoveries. ‘How and why did things change?’ looks at how archaeology's attempts at explaining changes in the past have varied depending on the politics, society, and predilections of the time. There is a branch of archaeology called theoretical archaeology. Archaeological theorists sometimes can come up with neat, convincing stories but they might not necessarily resemble the truth.