Something has gone wrong with desire. The most sexually liberated generation in history is having less sex than any before it. In Britain, the United States, Japan, and South Korea, the data tell the same story: more freedom, less wanting. The problem is not repression. It is something we barely have a name for.

In The Scientific Study of Desire, Boris Kriger traces a century of thinking about what it means to want from Freud’s groundbreaking discoveries about the unconscious to the smartphone in your pocket and reveals, for the first time in plain language, the structural science behind the modern crisis of desire.

Drawing on a formal research paper that proves its results with mathematical precision, this book translates that science into a narrative that any curious listener can follow.

The argument is as simple as it is unsettling: desire is not a substance inside you. It is a movement across a landscape. When the landscape has structure hills to climb, valleys to seek, paths that lead somewhere desire is vivid, directed, alive. When the landscape is flattened when everything is available, instantly, without cost or friction desire dissolves. Not because we lack willpower, but because the architecture no longer supports it.

Kriger shows why Freud was more right than anyone realized, why pornography rewires the brain’s capacity for intimacy, why no screen can replicate the biochemistry of touch, and why the best relationships require maintained imperfection. He maps the four regimes of desire from Victorian repression to digital saturation and leaves the reader with the question that science can pose but cannot answer

Now that we understand the architecture of wanting, what are we willing to do to preserve it?