One SDG target can change the world.
"Drop a pebble in the water, and one small ripple can reach further than you think. Big change starts with a single simple action." - David Hudson
Photo by Sergej Eckhardt
Hello Everyone
I’m David, I’m a sustainability🌱 advocate and the founder of 169to1.com and 169to1.org. And I would like to share with you my story…
Back in 2015, the world gave us a bold new framework: the Sustainable Development Goals. Seventeen ambitions. One shared deadline. A total of 169 targets.
But for all the promises, most people never got the full story, let alone a clear next step. We gave the world goals. But we never gave them roles.
We didn’t fail the SDGs because we didn’t care. We failed them because we never told people what they were supposed to do on Monday.
So I asked myself one critical question…
What is Sustainability?
Before any of that, one word needed to be clear. Sustainability is hard to define because it sits across many fields at once, and because political and economic interests shape how it is read. Competing priorities, missing standards, cultural and political readings, the pull between short-term gain and long-term thinking, and a meaning that keeps shifting as the science changes, all make it hard to hold to a single definition.
For the 169to1 ecosystem I wanted something simple and workable. So:
Sustainability is the process of living today, so that tomorrow is protected.
Let me show you something simple - 6174
Now you are probably wondering why did I give you a random four digit number?
Because selecting a simple number can show the power of a steady process.
It’s called ‘The Kaprekar Constant’, 6174, appears to be an ordinary number, yet it reveals something important. If you take almost any four-digit number, reorder its digits from largest to smallest, subtract, and repeat the sequence, the process always settles at 6174. It does not matter where you begin. The steps create the stability.
Here is what happens with my own birth year, 1976.
1976 → 9761 − 1679 = 8082
8082 → 8820 − 0288 = 8532
8532 → 8532 − 2358 = 6174
The pattern always converges. It works because the steps are clear and repeatable. This is the point. A clear, repeatable method turns disorder into direction. The number is not special. The process is.
169to1 works in the same way. You focus on one SDG target, take one action, record one piece of evidence, and continue the cycle. No matter how uncertain the wider world becomes, the structure holds. The pathway remains stable because the method is simple.
The Kaprekar Constant shows that even from a random starting point, a consistent sequence leads to a clear conclusion. That is the benchmark behind 169to1. A steady process that creates progress, step by step, for everyone.
So with that in mind, we can also make the very definition of ‘Sustainability’ simple too.
What if we made the SDGs simple?
Imagine one institution, one target, one deadline. That is the whole idea.
Then multiply that one institution by 169,000. It is 1 percent of the leading academia, SMEs, NGO teams and youth movements on the planet, and it is enough to start.
A school cannot pursue 169 targets. Neither can an SME or a community group. Ask one institution to carry the whole agenda and it carries none of it. Ask it to own a single target, give it a clear method and the means to deliver, and that target moves.
I have spent years solving problems in places where no one was waiting for a roadmap, schools with limited budgets, SMEs under deadline, community groups trying to make tomorrow work. When people are given a system they can use, action follows.
In June 2026 the UN's Sustainable Development Solutions Network set out the same conclusion this work was built on, that the goals were never the failure and implementation is the task that remains. I do not claim the UN adopted my method. I do note that the field has arrived, in 2026, at the position I took in 2017.
The SDG generation
My daughter Daphne was born the same year as the SDGs, or as some say, generation alpha. She is eleven now. By the end of this challenge she will be fifteen. One day she is going to ask me what I did, and how she can get involved.
I want to give her a real answer. Something honest. Something that works. Something she can take part in and build on, rather than only read about.
That is what this is. A starting point for a better legacy. One institution. One target. One legacy.
What is missing now is action. One percent of institutions, each acting on a single target with intent and consistency, is enough to begin.
That is where 169to1 begins. Here is how it works.
