The pro-bourgeois case would start with the historical observation that liberal values like tolerance and freedom have been a product of commercial life.

These historical observations of the same time period show periods of both warming and cooling.

Closely related to this, is the growth of a cash economy, and Marx makes the historical observation that:

Numerous other sources of historical observations have been identified.

This is then modified with actual historical observations of purchase behavior.

The action in the novel follows closely historical observations and descriptions as seen from the French perspective.

The Bashar sat silently, letting them stew in their own historical observations.

Remote sensing is a relatively new concept and so extensive historical observations are unavailable.

An observation, historical: all this is so new that people are making up the rules as they go along.

By 2020, this notion will be a mere historical observation.