I'm safe at home. Why pray for captives I can't help?
The last part of this prayer is about captives: "our brothers, the whole house of Israel, who are in distress and in captivity, whether at sea or on dry land." That can feel far from a Monday morning in shul. The sources treat it as close.
The Gemara looks at a verse in Yirmeyahu that lists four fates: death, sword, famine, captivity. Rabbi Yochanan says that in this verse each one is harder than the one before it. The Gemara then goes through them. The sword is harder than death, famine is harder than the sword, and captivity is harder than all of them, since all of them are in it.
The Rambam (Maimonides, the great Jewish thinker and lawmaker, who died in 1204) rules that redeeming captives comes before feeding and clothing the poor, and that no mitzvah is greater. His reason: a captive is hungry, thirsty, unclothed and in danger of death all at once. So the law asks for action, not only a prayer. The prayer is the part you can do from your seat.
The Dubno Maggid (Rabbi Yaakov Kranz, an Eastern European preacher of the late 1700s) used this prayer in a sermon he gave before Kol Nidrei on Yom Kippur. He told his listeners: you sit in a beautiful synagogue, with candles lit and books in front of you, while some of our brothers are scattered in fields, forests, mountains and on the water, waiting to die, unable even to say the prayers a sick person says. Then he asked: can we forget their sorrow and stop praying for them, in the prayer our ancestors set for every Monday and Thursday?
He closes with a promise from the Gemara: whoever asks for mercy for his friend, while needing the same thing himself, is answered first. The Gemara's proof is Iyov (Job), whose own fortunes were restored when he prayed for his friends. So the sermon treats this prayer as mattering twice: for the captives, and for the people saying it.
Bava Batra 8b; Yirmeyahu 15:2,Rambam, Laws of Gifts to the Poor 8:10,Ohel Yaakov (the Dubno Maggid), Acharei Mot,Bava Kamma 92aWhy pray to keep "the sages" alive? What do they have to do with me?
The third request is not "bless the sages." It asks God to keep them alive "among us": the sages of Israel, "them, their wives, their sons and their daughters, their students and their students' students, in every place where they live."
A Mishnah shows how the Sages saw such a loss. It lists what ended when great teachers died. When Rabbi Akiva died, "the honor of the Torah ended." When Rabbi (Yehudah HaNasi, who edited the Mishnah) died, humility and fear of sin ended. In that list, losing a teacher is a loss for everyone, not only for his students.
The Torah has a similar thought. After two sons of Aharon died, Moshe told Aharon and his surviving sons not to show mourning, but said: "your brothers, the whole house of Israel, will weep." Rashi (the main commentator on the Torah, in France in the 1000s) learns from this that the troubles of Torah scholars are placed on everyone, to mourn them. Almost the same four words, "our brothers, the whole house of Israel," are how the last part of our prayer begins. The verse says "your brothers"; the prayer says "our brothers."
The word "sages" may be wider than a job title. The Aramaic blessing Yekum Purkan, said on Shabbat after the Haftarah, lists heads of yeshivas and judges, then their students, and ends with "all who occupy themselves with Torah." Our request does not say where the line is drawn.
The sources we checked do not explain why wives and daughters are named, so that part stays open.
Mishnah Sotah 9:15,Rashi on Vayikra 10:6,Siddur Sefard, Yekum Purkan (Shabbat),Siddur Sefard, Mi Sheberach (Shabbat)Why does the last part start differently from the other four?
Four of the five parts open "May it be the will of our Father in heaven." The last one opens "Our brothers," with no "may it be the will." The first four ask for things for "us." The last turns to people far away.
The oldest wording we could open, in the Machzor Vitry, is different in a small way. It says "May God have mercy on you and take you out." It speaks to the captives themselves. Today's siddur says "on them."
Ta'amei HaMinhagim (a book on the reasons behind Jewish customs, in the Lemberg 1928 edition) asks your question: why does the last part not open "may it be the will of our Father in heaven" too? It passes on an answer, sent to its author in writing, in the name of Rabbi Shalom of Belz (a Chassidic leader in Galicia, who died in 1855). If there is unity among Israel, then it is automatically a time of favor. So when the prayer says "our brothers," no "may it be the will" is needed first. That is one explanation. It is not the only way to read the change.
The last words are in Aramaic: hashta ba'agala uvizman kariv, "now, quickly and soon." Ba'agala uvizman kariv is the phrase that ends a line in Kaddish. The Machzor Vitry has those words without hashta, "now." So the word "now" is not in the earliest copy we opened.
Machzor Vitry, Order of Shabbat 199,Ta'amei HaMinhagim 130:2,Kaddish