The Industrial Revolution began in England in the 18th century due to several key factors: large population and natural resources like coal and iron ore, an expanding economy, and inventions in textiles and transportation like the spinning jenny, steam engine, and steamboat. This led to rapid urbanization and growth of factories, but also poor living and working conditions for many as factories lacked regulations. The effects included the emergence of new social classes as workers faced long hours, low pay, and unsafe conditions compared to the growing middle class of factory owners.