に至るまで

に至るまで is used to indicate that something extends from a starting point and reaches a final point, including everything along the way.

It emphasizes that the range is wide, thorough, or surprising, often showing that even the final or extreme point is included. This grammar is commonly used to describe extent, range, or coverage, rather than time alone.

に至るまで is mainly used in written or formal Japanese, such as explanations, reports, and news articles.