When all labor rights were eliminated and slavery restored, delivery companies saw that human beasts were much cheaper than robots or drones. With the environmental crisis, pandemics, and climate change, deliveries made by slaves became commonplace in all cities. Initially, they were made by indebted people, prisoners, illegal immigrants, and all sorts of imbeciles bought as slaves. They were sick, dirty, disobedient, and inefficient beings. Beatings and chains could not improve their efficiency or performance.
Over time, companies developed and began to breed slaves in breeding farms, genetically and chemically altering the animals. Their muscles grew, their brains shrank, and with hormones and vitamins, they became much stronger, docile, and efficient slaves. They were born slaves; they don't question anything, they don't complain, they accept and obey. The most modern slaves are capable of carrying backpacks weighing over 50 kilos all day long, without rest and without beatings. They are microchipped, geo-referenced, and receive electric shocks when they stroll or stray from the established paths.
