Rory McIlroy’s career can be read as a map. This is a story about Rory McIlroy Northern Ireland — the county, the coastline and the courses that shaped a four-time major champion and nearly every road on it leads back to the same place: Northern Ireland. To understand McIlroy, start at the beginning, and the beginning isn’t a trophy. It’s a hill in County Down, where the wind never quite lets up. Holywood is a modest town on the shore...