Why iron is called the backbone of modern civilisation?

Iron is often referred to as the backbone of modern civilization because of its critical role in construction, manufacturing, and transportation. Its strength and durability make it essential for building infrastructure like bridges, buildings, and railways, facilitating economic growth and development. Additionally, iron is a key component in various industries, including automotive and machinery, underscoring its importance in technological advancement and everyday life. Without iron, the progress of modern society would be significantly hindered.