Why do we read the Book of Ruth specifically on Shavuot, the festival of receiving the Torah?

This source-based Hagut Yosef essay explores the question: Why do we read the Book of Ruth specifically on Shavuot, the festival of receiving the Torah? The canonical Hebrew article develops the theme through Torah sources and reflection on human life. This localized discovery layer preserves the source’s meaning and identity and does not add new halakhic, historical, psychological, medical, legal, political, scientific, or empirical claims beyond the Hebrew source.