The Second Industrial Revolution: Electricity, Chemistry, and Steel

Core Idea

A second wave of industrialization (ca. 1870-1914) harnessed electricity, chemical processes, and steel production at scale, amplifying industrial capacity and enabling new industries like petrochemicals and electrical power. This wave intensified competition for resources and markets among industrializing nations, creating economic pressures that fueled imperial expansion. Technological acceleration also increased military capability, contributing to arms races and the conditions for global conflict.

Explainer

From your study of the first Industrial Revolution, you know that Britain's industrialization (ca. 1760–1840) was driven primarily by steam, coal, and textiles: a new energy source (steam power) applied to mechanized production concentrated in factories. The Second Industrial Revolution that followed from roughly 1870 to 1914 was different in kind, not just scale. Its key technologies — electricity, synthetic chemistry, and Bessemer steel — enabled entirely new industries rather than simply speeding up existing ones, and it spread across multiple nations simultaneously rather than originating in one country.

Electricity was the central technology. Edison's direct current and Tesla/Westinghouse's alternating current infrastructure made it possible to transmit energy over distance — separating the point of power generation from the point of use for the first time. This was revolutionary: a factory no longer had to be built next to a river or coal mine. Electric motors replaced steam in factories; electric light extended the working day and transformed urban life; the telegraph and telephone accelerated communications across imperial networks. The electrical industry itself created new corporate forms — the large research-and-development laboratory (Bell Labs, GE's Menlo Park) — institutionalizing innovation as a process rather than leaving it to individual inventors.

Steel and synthetic chemistry completed the picture. The Bessemer converter made high-quality steel cheap enough to build railways, bridges, and warships at scale previously impossible. Synthetic dye and fertilizer chemistry, pioneered largely in Germany, created the modern chemical industry and — critically — the Haber-Bosch process for fixing atmospheric nitrogen, which would eventually enable industrial-scale food production. Germany's dominance in chemistry and electrical manufacturing gave it a structural economic advantage that alarmed Britain, which had led the first industrial wave but was now being overtaken in cutting-edge sectors.

The geopolitical consequences followed directly from the economics. Industrialized production required raw materials at scale (rubber, copper, petroleum, iron ore) that temperate European nations lacked domestically, driving the scramble for colonial territories in Africa and Asia during the 1870s–1900s. More factories meant more output; more output needed more markets, generating trade rivalries. And the same technologies that built wealth — especially steel and chemistry — also built weapons: Krupp steel cannons, explosive shells, eventually poison gas. The arms race between Germany and Britain in battleship construction from the 1890s onward is a direct product of this period: only the Second Industrial Revolution's steel and engineering capacity made fleets of massive dreadnoughts economically feasible. This is why the topic builds toward World War I origins: the war's industrial-scale carnage was made possible by — and in significant part caused by — the economic and geopolitical pressures that the Second Industrial Revolution created.