The concept of "concern" refers to a European, particularly German, business structure in which legally independent companies unite under centralized management, distinguishing it from parent-subsidiary relationships based on share ownership. This economic model, including contractual, factual, and flat forms, reflects complex legal and managerial dynamics. Philosophically and literarily, the term carries significance beyond commerce: John Locke presents it as a guide for human behavior, Max Stirner challenges societal duties, and Havelock Ellis connects it to shared social responsibility.
Authors such as Daniel Webster and William Wordsworth further examine its moral and personal aspects, highlighting its dual function as both an economic framework and a perspective on ethical or individual values. The theme thus connects corporate strategy with humanistic thought, revealing how "concern" intertwines practical organization with existential engagement.