Citizen One is not a textbook, it is a family warning.

It began with lived history — and with witnessing how identity becomes dangerous under centralised control. My heritage spans both sides of the Second World War. Opposing nations. Rival armies. Yet a common enemy: a regime that documented, dehumanised, and dominated populations.

In 1930s Germany, a centralised identity registry was built in the name of administration and public order. It was first justified as a way to manage criminals and social services. Later, it was used to restrict movement, deny food and housing, and ultimately to select people for removal and extermination.

My family lived through this period — when identity was not merely catalogued — it was weaponised.

Those systems did not begin with violence.

They began with paperwork.

As an engineer, I now watch modern digital identity systems being rebuilt — more efficiently, more comprehensively, and with far fewer constraints — and I recognise the architecture. The technologies are different. The logic and power imbalances are not.

Citizen One connects my family's historical inheritance with the digital systems being deployed today. It examines how identity infrastructure quietly reshapes power, compliance, and human behaviour long before its consequences are obvious — and what it feels like once they can no longer be ignored.

This book is not written in hindsight. It is written in warning — informed by family history, historical records, ethical reasoning, and technical understanding.