The book answers its own question in the next line: “A simple answer is that society would not be able to function.”
Take the four sets of rules the paragraph has just listed and remove them one by one — the answer becomes very concrete.
| Rule | If nobody followed it |
|---|---|
| Rules at home | No fixed meal times, nothing put back in its place, nobody telling anyone where they are going — small quarrels every day, and no one safe |
| Rules in school (for students and for teachers) | Classes would not begin on time, no one would know which room to go to, and a teacher could not teach through the noise. Learning would simply stop |
| Examination rules | Marks would mean nothing, because honest and dishonest work could not be told apart |
| Traffic rules | Exactly the lower picture of Fig. 10.1 on page 151 — vehicles facing every direction, cycles and pedestrians squeezed between cars, nobody moving. And accidents |
| Rules at work (for employees and employers) | Nobody could count on being paid, and no employer could count on the work being done |