Legged robots have recently transitioned from science fiction to engineering fact, with modern humanoid and quadrupedal machines now capable of delivering parcels to front doors and taking on dangerous military missions. With a massive surge in financial investment in the offing, a new study describes the technical advances that have made legged robots a reality and explores the critical ethical considerations, economic potential, and policy implications of the "intelligent machines" that are increasingly walking among us.
The study, Advances, Challenges and Opportunities for Legged Robots, published in Science Robotics, evaluates five critical pillars: hardware, locomotion, autonomy, data, and applications. The international team of researchers has mapped how humanoid and quadrupedal systems are set to fundamentally revolutionise the way we work, interact, and co-exist with intelligent machines.
Co-author of the study, Professor Robert Sparrow from the Monash Arts Faculty's Department of Philosophy, suggests that as these machines become more life-like, this necessitates discussions around the ethics of their use.
"We are rapidly approaching a point where our new metallic 'butlers' might not just be carrying our groceries, but also providing more intimate services to our older relatives, justified as a solution to a demographic crisis in aged care. However, in the rush to outsource care to robots, we need to ask whether this is what older people want, and whether machines can truly ever replace human connection."
"Filling our homes with robots with cameras in them raises concerns about who controls that intimate data. Are we keeping vulnerable people safe or consigning older citizens to a dystopian world of surveillance by robots?"
The fact that humanoid robots are often designed to look masculine or feminine, and that people may respond differently to robots depending on their appearance, means, according to Professor Sparrow, that they can raise complex questions of race and gender.
Professor Sparrow also notes that the way we treat robots may reveal disturbing truths about us.
"While kicking a robot vacuum cleaner might just express frustration, kicking a robot dog reveals something far more troubling about our own character."
A key question here, he suggests, is how much the lessons users learn from their interactions with robots affect the way they relate to people and animals.
"Whether people can form genuine friendships with non sentient beings is contested. What seems clear, though, is that some people are likely to rely on them for companionship and emotional support. What happens if the robot breaks down then? Are we actually making people more socially isolated if we provide them with robot companions that reduce their motivation to seek out the company of other people?"
Professor Sparrow also considers the expansion of the roles of legged robots in war and the potential to lower the psychological barriers to killing, and ultimately reduce the overall threshold for conflict. These advancements further complicate the legal and ethical frameworks required to attribute responsibility for battlefield effects and raise significant human rights concerns.
The rise of the robots also has broader socio-economic implications, such as a potential risk of technological unemployment and widened social inequality. While previous waves of automation primarily impacted the manufacturing sector, these new legged systems have the potential to affect the service sectors that employ roughly 80 per cent of the workforce in some developed economies.
Ultimately, Professor Sparrow argues that the most important part of a robot isn't its legs, but the policy and democratic mandate governing its development.
He insists that we must ask the tough questions about who holds the authority to build and control these technologies, lest we risk allowing a small and unrepresentative group of engineers to radically rewrite the social fabric of our communities without a clear mandate from the public they are meant to serve
