Okay, I need to create a Wikipedia-style document about "협동" (cooperation) under the categories of society, human relationships, and cooperation. Let me start by understanding the requirements.

First, the structure: H1 for the title, an overview section, several sections with H2 and H3 headings, and maybe references or related documents. The content needs to be accurate, objective, detailed, easy to read, and use professional terms with explanations. Also, markdown formatting with proper hierarchy, lists, tables, code blocks if needed, and at least 800 characters.

Starting with the title: "협동" as H1. Then an introduction that defines cooperation in the context of human relationships. Next sections could be types of cooperation, importance, challenges, examples, and maybe a conclusion. Each section can have sub-sections (H3).

For the overview, I should explain what cooperation is, its role in society, and why it's important. Then under types, maybe different forms like voluntary vs. structured, or based on goals. The importance section could discuss social cohesion, economic benefits, etc. Challenges might include conflicts of interest, free-riding, communication issues. Examples can be real-world cases like community projects, businesses, international agreements.

I need to make sure each part is detailed but not too technical. Use terms like "공동 목표" (common goals), "상호 이익" (mutual benefit), and explain them if necessary. Maybe include a table comparing different types of cooperation or examples. Also, check for accuracy—maybe reference some theories or studies on cooperation.

Wait, the user mentioned to use markdown with H2 and H3. So sections like "협동의 정의와 중요성" as H2, then under it "정의" and "중요성" as H3. Need to avoid markdown in the thinking process but ensure the final output has proper structure.

Also, need to reach 800 characters. Let me check each section's length. The introduction should be concise but informative. Each subsection needs enough detail. Maybe add a part on how cooperation is fostered, or factors that promote it. Also, mention challenges and solutions.

I should verify if there are any specific theories or models related to cooperation in social sciences. For example, game theory concepts like the prisoner's dilemma, or social capital theory. But since it's a general overview, maybe keep it high-level unless specified.

Avoid using code blocks here since it's about cooperation, not programming. Use lists for types of cooperation or examples. Maybe a table with examples and their outcomes.

Check that all parts are in Korean, use appropriate terminology, and maintain an academic tone without being too dry. Ensure each section flows logically into the next.