The introduction of human-centered methods to design did not just improve design methods. It didn’t simply improve the quality of design work.

The introduction of design research — the essence of human-centeredness — fundamentally transformed design.

It radically differentiated what engineers always meant by design from what designers mean by it — and what we all now implicitly mean when we speak of design.

A similar essential change might be in store for design as we move from design intended for solo use, centered on one person at a time to design meant to mediate interactions between multiple persons, each of whom is part of the other’s experience.

For years now I’ve experienced philosophy as a kind of design. I don’t mean that the theoretical concept occurred to me. I mean I noticed that I had already for some time been evaluating philosophies as designed artifacts. And I don’t only mean that I was assessing the objective content of the philosophies as well-designed or poorly-designed. More importantly, I was noticing how I responded to the world itself mediated by the philosophies I internalized as I read them. The medium of philosophy is its message, not the content of propositions or arguments. I treated the philosophy as an invisible mediation of my experience of life, which got worse or better, based on the deep design of the philosophy.

I call this understanding of philosophy design instrumentalism.

I now believe philosophy should be a kind of polycentric design.

We must design philosophies for interoperability within culture, or we are committing design malpractice.