There's only one thing that all the successful companies in the world have in common: None was started by one person.

The remark underscores Sirolli’s recurring emphasis on collaboration and local, practical knowledge in entrepreneurship. It argues against the “lone genius” myth by claiming that durable business success depends on complementary skills—e.g., a product visionary paired with operational, financial, and sales expertise. Read less as a literal statistical claim and more as a rhetorical principle, it highlights that companies scale through teams, networks, and shared accountability. In Sirolli’s broader development-and-enterprise work, the idea also aligns with his critique of top‑down solutions: sustainable ventures emerge when multiple stakeholders contribute, challenge assumptions, and co-own the outcome.