“A choice of catastrophes”

“A choice of catastrophes” is Filippo Crosetti’s stark description of the dilemma behind the nanobot programme developed by Jack Harkness, Astrid, and Filippo. It presents their plan as a response to looming climate and ecological collapse, but also exposes the brutal logic by which they would try to prevent it: reducing humanity through a technology already spread widely among the public.

The dilemma behind the phrase

Filippo sets out the choice as one between an unacceptable answer now and a worse one later. He says there is “no right answer” and calls the situation “A choice of catastrophes.” The phrase is not an abstract maxim: it follows his admission that the plan is both madness and sanity, and that he once believed in its purpose. He still partly accepts the environmental case, even as he says he has lost his nerve and that Jack and Astrid have taken the decision out of his hands.

The environmental case

The plan’s stated urgency rests on a specific carbon budget. To hold global temperature increase to two degrees above pre-industrial levels, Filippo explains, emissions would have to fall to half their current level by 2050 and then reach zero. This would not reverse warming; it would limit the rise and keep it there. The total carbon budget is eight hundred gigatons. More than five hundred have already been emitted, leaving fewer than three hundred; at a rate of ten gigatons a year, he says, less than thirty years remain before emissions would need to stop. Otherwise, he warns of unprecedented floods, storms, droughts, and famine.

His argument extends beyond climate. He cites estimates that at least twenty per cent of species could be extinct or near extinction by 2050, making the unfolding loss a sixth mass extinction. The previous worst, he says, followed the asteroid strike that wiped out the dinosaurs sixty-six million years ago. This time, humanity would be responsible. The scale of the threatened loss gives the phrase its sense of urgency, while also making clear that Filippo’s appeal is built on projected futures, not on a harm already completed.

The means of prevention

Jack’s answer to these threats is the nanobot programme. Filippo says he joined Jack and Astrid twelve years earlier after they persuaded him that their plan was right. The programme was developed to produce the result they believed the world needed, and its reach was made possible through Harkness Pharmaceuticals: nanobots entered the bloodstream through drugs and cosmetics, and also through food grown with the company’s pesticides or meat from animals treated with its antibiotics. Filippo names products including Elixtris and Fenextris among the routes of exposure.

The nanobots eventually leave the body, but Filippo says they are continually replaced by new production from factories around the world. Millions of people have swallowed them, received them by injection, or absorbed them through their skin. He describes them as a plague without symptoms, a phrase that underscores the gap between the ordinary uses of the company’s products and the programme concealed within them. The plan depends not on a clearly bounded group of participants but on a technology distributed through everyday medical, agricultural, and cosmetic channels.

Doubt, responsibility, and cost

Filippo says the human reduction would be more than anyone could count, yet also claims it would be enough to keep temperature rise below two degrees. His reasoning treats humanity as the threat to both itself and other species: cut the number of people far enough, and the threat would diminish massively. That is the catastrophic arithmetic the phrase contains. Ecological damage is gradual and dispersed; the proposed remedy makes human lives the direct instrument of intervention.

His hesitation sharpens the conflict. Filippo believes that a switch to renewable energy in the next decade might still achieve the necessary reductions without the programme, but admits that he may have been kidding himself. He depicts Jack and Astrid as committed to a problem-and-solution logic, unwilling to wait or compromise. In the same account, he says Astrid paid for Holly Walsh to obtain Ditrimantelline and describes her as wanting Holly comfortable before the end. The detail connects the vast environmental scheme to an intimate human cost and shows why Filippo’s continued belief in the goal no longer settles the question of whether its means can be defended.

The expression therefore works as both argument and indictment. It gives voice to a genuine fear of climate breakdown and mass extinction, but its apparent balance conceals an imposed choice: the programme’s designers decide that the prospect of future catastrophe warrants an intervention whose consequences fall on people who are already carrying the nanobots. Filippo’s words preserve his divided position—understanding the case, recognizing the plan’s terrible scale, and no longer claiming the certainty that once made participation possible.