Machines have been affecting our lives since about 1760, when steam-powered engines sparked the Industrial Revolution of the 18th and 19th centuries. Before long, craftspeople who made goods by hand were largely replaced by factories that use machines to produce items at faster rates and in much greater numbers.
Robots were brought into the workforce starting in the 1960s, when they were first used on assembly lines to help build cars. Today, more than 3 million industrial robots are used worldwide. Most do straightforward, repetitive tasks.
But in recent years, AI-equipped bots have been taking on increasingly complex jobs as chefs, security guards, and even deep-sea explorers. Researchers are also developing social robots—like Sophia—that are meant to interact with humans on a more personal level. Some are being tested for use as caregivers in hospitals and senior centers.
Why are companies replacing human workers with robots for such complicated tasks? For one thing, even though robotic systems are costly to buy and maintain, in the long run they’re often cheaper for large businesses than hiring enough humans to do the same jobs.
Another advantage? “Robots can often complete tasks more quickly than humans can—without getting tired,” explains Chui.
Robots are also useful in jobs that are dangerous for people. They can search for survivors in the rubble of buildings downed by earthquakes, for example, or safely remove and detonate explosive devices.