世の中

1. Origins, structure, and basic meaning

• Structure: 世の中 (よのなか) is a noun for the human world or society.
• Basic usage: 世の中には仕事がある sets society as the domain of existing jobs; 世の中の仕組み refers to how society operates.

2. Common pitfalls and similar expressions

• Domain of existence and social structure
  • には establishes a social domain, while の仕組み points to its workings; the noun is not limited to the physical planet.