• Began in Britain, powered by steam engines and water.

Key Technologies:

• Steam engine, mechanized textile production, railroads.

Employment Changes:

• Shift from agriculture → factory work.

• Urbanization, rise of the factory system.

• Heavy use of child and female labor, harsh working conditions.

• Age of electricity, mass production, and global trade.

Key Technologies:

• Electricity, steel, telephone, telegraph, assembly line (Fordism).

Employment Changes:

• Expansion of manufacturing jobs, more urban growth.

• Rise of the working class, labor unions, and labor protections.

• Work became more repetitive, but wages and living standards slowly improved.

• Digital and information revolution after WWII.

Key Technologies:

• Computers, semiconductors, the Internet, automation.

Employment Changes:

• Decline of traditional manufacturing jobs.

• Growth of service economy and knowledge-based work.

• Globalization and outsourcing reshaped labor markets.

• Term popularized by Klaus Schwab (2016). Fusion of physical, digital, and biological systems: Fourth Revolution.

Key Technologies:

• Artificial intelligence (AI), robotics, Internet of Things, big data, biotechnology, 3D printing, quantum computing.

Employment Changes:

• Automation replaces many routine jobs.

• Rise of the gig economy (Uber, food delivery), flexible but unstable workfourth revolution.

• New skills required: digital literacy, data analysis, machine learning.

• Remote work, platform-based jobs, and flexible models become mainstream.