Who wrote the Haggadah?

The Haggadah, meaning "telling" in Hebrew, is a significant Jewish text outlining the Passover Seder's sequence. It is a Jewish practice to read the Haggadah at the Seder table as an obligation for every Jew to narrate the story from the Book of Exodus, recounting God liberating the Israelites from slavery in Egypt with a strong hand and an outstretched arm. Traditionally, the Haggadah's compilation is attributed to the Mishnaic and Talmudic periods, with uncertainty about its exact origin date. Scholars suggest that the Haggadah could not have been written before Judah bar Ilai (around 170 CE), the latest Tanna mentioned in its texts. Disagreements arose between Abba Arika and Samuel of Nehardea (around 230 CE) concerning the compilation of the Haggadah, indicating its incomplete status. Historical records suggest that the Haggadah was likely finalized by the time of Rav Nachman. However, there is ambiguity regarding which Rav Nachman the Talmud refers to—Rav Nachman bar Yaakov (around 280 CE) or Rav Nachman bar Yitzchak (360 CE). During the Geonic era, additional selections from midrashim were incorporated, possibly by Rabbi Amram Gaon (circa 850), who is credited as the compiler of the present collection, akin to his role in redacting the daily liturgy in the Siddur. Notably, the Haggadah includes the significant midrash of the four children, symbolizing diverse perspectives on the observance of Passover, drawing from the Jerusalem Talmud and the Mekhilta of Rabbi Ishmael, albeit slightly modified in the current ritual. Various rabbinic narratives from Aggadah literature, such as the discourse of Eliezer ben Hurcanus on the Exodus, are also integrated into the Haggadah. Despite the Haggadah's core text remaining largely unchanged since its inception, additional components, like the cumulative songs "One Little Goat" (חד גדיא) and "Who Knows One?" (אחד מי יודע), introduced in the fifteenth century, have enriched the collective experience. The Passover Haggadah is one of the oldest and most widely disseminated Jewish texts beyond the realm of Scripture, embodying a rich tapestry of religious and historical significance.