Our ancestors didn’t develop or use maps in order to enhance their capacity for conceptual thinking or to bring the world’s hidden structures to light. Nor did they manufacture mechanical clocks to spur the adoption of a more scientific mode of thinking. Those were by-products of the technologies. But what by-products! Ultimately, it’s an invention’s intellectual ethic that has the most profound effect on us. The intellectual ethic is the message that a medium or other tool transmits into the minds and culture of its users.