The largest French youth movement in decades started not with ideology but with logistics. On 17 September, students at Lycée Saint-Exupéry in Créteil returned from summer holidays to find they couldn't continue their studies because too many teachers hadn't shown up. They blockaded their school. Within weeks, hundreds of schools across France followed. The grievances are structural, not performative. Thousands of French schools need physical repair. Class sizes exceed OECD averages. School days are longer than peer nations. Roughly 10% of teaching hours go undelivered annually due to absent staff. Teacher pay progression is poor enough to create chronic shortages, particularly in deprived areas. School nurses and disability support staff are severely understaffed. France spends 28% more than the OECD average on high schools, but the money goes to maintaining an unusually large building stock and expensive vocational programmes — not to fixing the staffing crisis. The movement's character is genuinely bottom-up. Sociologist Fabien Truong praised the protesters' "maturity and coherence," noting a social media effect: students at wealthier schools shared videos of rats, collapsing ceilings, and broken toilets at poorer ones, and then joined the barricades themselves. Elite state schools in central Paris blockaded in solidarity. Teenage girls sitting atop piled bins told reporters: "We're told state education is a great leveller, but that's not the case." The government's response escalated the crisis from educational to political. Initially distracted by fuel costs and a difficult budget, officials ignored the movement. When they engaged, it was through police rather than policy. Eighteen investigations into possible police brutality are now under way, including a 15-year-old who lost his hand to a stun grenade and a 14-year-old whose jaw was shattered by what was allegedly a rubber-bullet launcher. The interior minister suspended stun grenades but denied systemic brutality. The police response radicalized the adult population. Parents, grandparents, and teachers flooded the streets alongside students. An Elabe/BFMTV poll found 72% of French people considered the students' demands legitimate, though 55% also wanted the protests to end. Hundreds of thousands marched in cities across France this week — a scale that surprised even experienced observers. The movement is now refracting through presidential election politics ahead of next year's vote. Jean-Luc Mélenchon, backed by 47% of voters under 35, loudly supports the protesters. Marine Le Pen blames the current government for chaos and calls for an anti-riot law. The prime minister himself called the students' demands "legitimate" — an unusual concession that signals the political class knows the underlying complaint is real. Spain and the UK are experiencing parallel youth frustrations: mass Spanish street protests over housing, and jobless young people outside the Labour conference in Liverpool. The common thread across all three countries is a generation confronting the erosion of economic security and public services that their parents and grandparents could assume. Whether governments respond with investment or riot police will determine whether this energy becomes reform or radicalization.