Institutions are defined as collective constraints that structure human interaction, including formal constraints like laws and regulations, and informal constraints like social norms. Organizations are groups of individuals united to achieve common goals, and can include political, economic, social, and educational bodies. The key differences between institutions and organizations are that institutions have broader concepts and are decentralized, while organizations have more narrow concepts and specialized roles. Institutions also focus on delivering values and knowledge to society, rather than profit or services like organizations.