Ideas shape the course of history.

Ideas are the cogs of history—and too often the barricades that stand in its way.

Human history is in essence a history of ideas.

History is moving in zig-zags and by roundabout ways.

History moves in strange ways.

The history of thought may be summed up in these words: it is absurd by what it seeks and great by what it finds.

Ideas are like bundles of trajectories undergoing complicated evolution.

The history of ideas since 1789 is an endless record of mass murder in the name of the people.

Gotta head full of ideas that are driving me insane...

That great dust-heap called ‘history’.

History, if it has taught us anything at all, has taught us that the strange ideas we deride today will one day be our celebrated truths.

History is a sequence of random events and unpredictable choices, which is why the future is so difficult to foresee.

Some historians hold that history is just one damned thing after another.

History is an endless maze of unrelated happenings, until we divide it up into brief portions in which we discern a certain unity of purpose.