The extinction of The Upright Man may have been caused by "lazyness"

an international team of researchers recently discovered that ancient human "uprights" died out about 200,000 years ago, possibly in part because they were "lazy".
Homo erectus belongs to the Genus, which appeared about 2 million years ago and belongs to a different species from modern people (Homo erectus).
Researchers in countries such as Australia and the United Kingdom recently reported in the American journal
that they analyzed a site near Dewadimi in central Saudi Arabia and found that Erectians in the early Stone Age were not "diligent" in making tools and collecting raw materials, but had been using "the most labor-saving strategy."
researchers say the Erectors use the stones around their places of view at will when making stone, rather than d'a hard way to collect better-quality stones on a nearby hill. This is in sharp contrast to the early Homo homoros and Neanderthals. Early Homoros and Neanderthals climbed mountains in search of high-quality stones and shipped them back from afar.
study also found that The "lazyness" of Erectto is also reflected in the very conservativeness of technological innovation. Although the surrounding environment has changed, they still live by the old ways and by relying on existing tools, rather than finding ways to make changes.
the researchers concluded that "lazyness" may have played an important role in the extinction of Theo erectan. (Source: Xinhua News Agency)