Tokyo Design Forum publishes former Facebook and Dropbox design leader Soleio’s closing talk from this year’s conference, where he previews a book-sized thesis called The Geometry of Luck. Soleio’s move is to treat luck less like a mood and more like a design problem: a question of arrangement, position, and conditions.
He starts with geometry because geometry gives the argument its discipline:
When we say something has a geometry, we mean it has structure.
Not just parts, but relationships between parts, distances, angles, arrangements that produce specific properties.
For example, a triangle just isn’t three lines, it’s three lines whose arrangement do something. The interior always sum to 180 degrees, no matter the triangle. That is geometry. It’s structure that produces reliable properties.
So when we talk about the geometry of a room, or the geometry of a negotiation, or the geometry of a network, we’re saying something very specific about its nature. We’re saying its composition, its arrangement, tells us more than a list of its parts.
That saves the talk from becoming another self-help riff on “making your own luck.” Soleio is more precise than that. He is saying luck has variables, and designers already understand the work of arranging variables toward a purpose. He links that to industrial designer and architect Charles Eames’s definition of design as a plan for arranging elements toward a purpose.
When something has a geometry, it can be measured, it can be reasoned about, it can be taught.
[…]
So geometry is a language of arrangement.
For designers, it’s like the vocabulary of our craft.
From there, the framework becomes practical:
I believe luck has three facets, three independent variables that work together in concert. They are the basic elements of good fortune.
The first I call orientation, how we perceive our environments and place ourselves within them.
The second is surface area, the degree to which we’ve made it easy for good fortune to find us.
And the third is novel action, our capacity to act on what we perceive, what we do with the opportunities that the universe presents to us.
The useful distinction here is agency without control. You don’t command the outcome. You arrange the conditions: what you can see, who can find you, and whether the value you create can keep circulating after it leaves your hands.
That is why the talk eventually turns back toward software design:
As software designers, we shape the environment where luck happens.
We are very, very lucky to be here in this room today.
Few inventions touch the fabric of people’s daily lives, such as software.
Every interface, every space, every system we create either amplifies or dampens the flow of opportunity for the people who encounter it.
With every over-the-air update we push to production, we alternate the networks through which luck flows.
And so I hope designers put as much consideration to luck as they do look and feel and utility.
I like that as a design brief. Not “be lucky.” Not “hustle harder.” Arrange yourself, your work, and your systems so more good fortune can pass through them. Test hypotheses. That is a useful bar for products too.

Soleio—The Geometry of Luck
Soleio reframes luck as a measurable structure with three facets—orientation, surface area, and novel action—in his closing talk from Tokyo Design Forum 2026.





















