2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/33837I discuss J. Barbour's Machian theories of dynamics, and his proposal that a Machian perspective enables one to solve the problem of time in quantum geometrodynamics (by saying that there is no time). I concentrate on his recent book 'The End of Time' (1999).48 pages Latex. A shortened version will appear in 'The British Journal for Philosophy of Science'General Relativity and Quantum Cosmologytext