Hypothesis

Observations:

• “Right” policies tend to be more reactionary, focusing on preserving the past.
• “Left” policies tend to be more revolutionary, focusing on preparing for the future.

Conclusion: even if we assume Rightists and Leftists are about equally likely (on average) to be in the wrong about any particular issue at any particular point in time, we would still expect societies as a whole to gradually shift Leftward–which is, in fact, what history shows.

Thoughts?