What a 1970s Microprocessor Can Still Teach Us About How We Think

On March 15, 1976 — the Ides of March — a small chip was approved for production that would go on to shape how an entire generation learned to reason. The Z80 microprocessor was never the most powerful. It never became the backbone of global infrastructure. But it stayed in production for 48 years, and for the millions of people who encountered it early, it did something far more lasting than compute: it taught them how to think.

I recently published a full essay on exactly this in Telicom, the journal of the International Society for Philosophical Enquiry. What follows here is a brief introduction to the ideas in that piece — not a substitute for it.

What drew me to write about the Z80 was not nostalgia but a question I find increasingly important: what does it mean to understand something all the way down? The Z80 rewarded that kind of understanding. It punished vagueness. Its registers, its memory map, its timing constraints — all of it was finite, intelligible, and honest. You could follow the logic from beginning to end. That is rarer than it sounds, and rarer still in the tools we use today.

Marshall McLuhan argued that the medium is the message — that the deepest influence of any tool rests not in what it conveys but in how it reshapes perception and understanding. By that measure, the Z80 was never just a processor. It was a cognitive environment. And the habits of mind it built — clarity, constraint, causality — outlasted it by decades.

The full article goes deeper: into the Z80’s unlikely longevity, its role as a cultural engine, and what it means for a technology to complete its work rather than simply become obsolete.

Read the full article: The Machine That Taught Us How to Think is published in Telicom, Vol. 38, No. 2 (April–June 2026), the journal of the International Society for Philosophical Enquiry. ISPE membership is open to those who score at or above the 99.9th percentile on a standardized test of intelligence. Visit thethousand.com to learn more about ISPE and how to access Telicom.

If you have ever learned something by being forced to understand it completely — with no abstraction layer to hide behind — I think the full piece will resonate. I would love to hear your thoughts.