Passage Summary: Using a specific theory helps historians organize their work, but history is so messy and complicated that no single theory can fit everything in.

Conclusion: Historical analysis will inevitably fail to capture every major trend of the past.

Reasoning: The most effective historical analysis requires a theoretical framework, but the past is too complex for any framework to encompass all its main trends.

Analysis: This argument sets up a conflict between a necessary tool (theoretical frameworks) and the nature of the subject matter (the past). If the 'best' way to do history is through a lens that is inherently too narrow to see everything, then even the best history will be incomplete. We should look for a conclusion that acknowledges this limitation. The most logical completion will likely bridge the gap by stating that a complete capture of all trends is impossible for historians.