Reply To: Maharal’s Golem

כל ארצות עיסה לארץ ישראל, וארץ ישראל עיסה לבבל.
Before Ezra left Bavel to lead most of Klal Yisra’el back up to Eretz Yisra’el, he clarified the yichus of all the Yidden remaining in Bavel, and took any of the mamzeirim or other pesulei kahal up with him. Leaving Bavel as the area most kasher to marry from. (Gemara Kiddushin Perek Asarah Yuchsin.) Ezra did this because he was not leaving Rabbanim over in Bavel to watch over yichus matters.
(It is not referring to “descendants of Ezra.” Rather to Ezra Hasofer’s work in clarifying the nations Yichus. Yichus here refers to halachakly allowed to marry to all Yiden.)