If it weren’t for Senku, most of the other human characters in Dr Stone would be completely lost. None of the petrified humans would ever have been resurrected. The humans of Ishigami Village may have been stuck in the Stone Age for another 3,700 years. Senku’s encyclopedic knowledge of all things science not only makes him the most qualified person to rebuild society, but he uses it to solve many more immediate problems. For all the times science is used to solve problems in this series, the characters who are not scientists risk being considered almost useless.
However, just because not everyone knows everything about science doesn’t mean they’re useless. Each character has something they can do to help rebuild civilization. Senku’s role happens to be the most important and pronounced.
What makes it particularly difficult for the rest of the cast is that the story is designed so that science is the only thing that can save the day. A major aspect of Dr Stone presents various scientific discoveries and inventions and their practical applications. Thus, almost all conflicts or obstacles are overcome thanks to the latest discovery or invention. Unfortunately, this need for Senku’s latest scientific achievement to solve a problem renders any other solution useless. This is probably why Kohaku, despite being one of the greatest warriors in the Stone World, never wins an important fight. This is also why Ishigami Village never made any technological progress despite being 3,700 years ahead of Senku; rather, they dismissed science as a kind of witchcraft. Of course, Senku has relying on science to resolve disputes like these, but it comes at the cost of making everyone else seem helpless in comparison.
That said, Senku can be quite helpless when alone. For the first six months after his rebirth, he stuck to basic stone and wooden tools to get through his daily life. At this point, he was no better off than anyone else in Ishigami Village. Senku’s biggest problem is that he is physically weak. He knows everything he needs to know to rebuild society, but he doesn’t have the strength to do it. To put it in video game terms, like the character in question, it’s like he dumps all of his stat boosts into intelligence, so his other stats are still at base level. All the knowledge in the world is useless without the power to use it all.
It wasn’t until Senku created or revived allies in the Stone World that he was able to begin to make any real progress. With their help, Senku had the intelligence and the strength to gather materials and do things with them. Of course, that doesn’t mean Senku won’t participate if necessary. What’s important is that he’s there to coordinate the rest of the cast and work with them to build what needs to be built.
Besides manual labor, Senku makes extensive use of the other characters in their respective areas of expertise. Kaseki’s craftsmanship was needed to put together some of the series’ more intricate inventions, especially those made of glass. Yuzuriha, who is also skilled in craftsmanship, has proven useful in making clothes and, more importantly, in rebuilding destroyed stone statues. Gen’s mentalist abilities have helped him pull the realm of science out of some pretty sticky situations. In subsequent seasons, Ryusui will rely on his sailing and sailing expertise. Everyone brings a skill to the table that Senku doesn’t have.
Even if the others aren’t scientists themselves, they can still come up with good, helpful ideas. When Senku was developing his revival liquid, Taiju offered to use grapes as a source of alcohol. Chrome took the lessons Senku taught him to recreate things like the waterwheel and sodium hypochlorite; this is especially impressive considering the fact that, unlike Senku and the other resurrected humans, he had no prior knowledge of these things. These amateur scientists bring new eyes to certain problems and find solutions that Senku could not have found alone.
The only characters that still get the raw treatment in the realm of science are warriors. Again, since the story requires all problems to be solved by science, they will almost never be allowed to win a major battle. When it comes to scientific work, their power is usually only used for manual labor that others cannot handle. If there was another Shōnen Jump manga, this power dynamic would be completely reversed.
Non-scientists in the realm of science also serve the narrative purpose of representing the knowledge and intelligence of the average person. Senku has a bad habit of explaining the science behind things in a way that can make listeners stupid for not knowing what he’s talking about. The rest of the cast’s responses to what he has to say let the audience know that if they’re feeling lost, they shouldn’t feel alone. This applies especially to resurrected humans who have lived with modern technology but have only passing knowledge of it at best; Gen’s reactions, for example, are about what the writers expect the average person to respond to Senku’s words. Audiences are expected to know a little science from one source or another, but not serious stuff like complex chemical compounds or the inner workings of a phone.
Senku may be the smartest man alive, but he needs everyone else as much as they need him. Although he provides the science, they all provide the manual labor and other skills essential to making his visions a reality. It is a synergistic union of mind and body that requires the cooperation of everyone in the Stone World. Without one of these talented people, Senku’s plans to rebuild humanity would never have happened or at least would have been delayed for years. He needs them as much as they need him.