Robert MacarthurEdit
Could you clarify which Robert Macarthur you have in mind? The name matches more than one public figure, and the most commonly referenced is Robert H. MacArthur, the American ecologist (1930–1972) known for the Theory of Island Biogeography and niche theory. If you meant a different person (politician, author, etc.), please provide a bit more detail (occupation, dates, region).
Also, would you prefer a strictly neutral, encyclopedic article, or one written from a clearly stated perspective? I can adapt to a balanced, multi‑view presentation and still include the internal encyclopedia linking format you requested.