What is the irony of the fire in lord of the flies chapter 12

During the beginning of the book, the fire was two things: it was a way to signal for a rescue, and it was a tool to cook food and keep them warm. In both cases, it was a marker of civilization. However, by Chapter 12, things have reversed. Fire is now a sign of savagery, as the boys are trying to burn Ralph out.

the industrial revolution pushed the world into modern industrialization. it changed the course of history profoundly. it caused rapid urbanization and pushed cities and countries into development. the industrial revolution began in great britain with a series with new inventions which led to the creation of machines and mass production.

this caused the country to gain wealth and money and become an international superpower. it improved transportation and manufacturing inside the country, pushed people to live in urban areas and britain to become the most powerful nation in the world for a while.