Is solitary confinement cruel and unusual punishment?

Since solitary confinement has been designated as “cruel, inhuman or degrading treatment or punishment” under international law, many lawyers have argued that it is also the kind of “cruel and unusual punishments” prohibited by the Eighth Amendment.

הִלֵּל אוֹמֵר: אַל תִּפְרֹשׁ מִן הַצִּבּוּר.

Hillel says: Do not separate yourself from the community.

...אמר אל תפרוש מן הצבור כי הצבור שהם הכלל הם עומדים כמו שהתבאר כי אל הצבור יש קיום יותר, ולפיכך הפורש מן הצבור פורש מן הדבר שיש לו קיום ביותר. ועוד כי הכלל הוא הכל, ויש בהם כח הכל, ולפיכך הפורש מן הצבור פורש מהכל והוא מבחוץ, ואם הוא מבחוץ להבל נחשב דבר זה שיצא מן הכלל. ודבר זה מבואר בדברי חכמים שמנו הפורשים מדרכי הצבור בכלל מינים ואפיקורסים שכופרים בתורה ובתחיית המתים כדאיתא במסכת ראש השנה (י"ז, א') ....

וכן מי שפורש מן דרכי צבור הוא יוצא מן הכלל.ואמר כי הכלל הוא עיקר לא היחיד הפרטי שהיחיד הוא בעל שינוי ואלו הכללים עומדים כמו שהתבאר, כי כח הכללי עומד בלא שינוי.

Hillel says "Do not separate yourself from the community" because they are the society/total, they endure, as was explained that the community has more existence, and therefore the one who separates from the community separates from something that has the most existence.

Furthermore society is everything, and they have the power of everything, and therefore one who separates from the community separates themselves from everything, and they are outside. If that one is outside they are considered for for naught because they left society.

This matter is explained in the words of the Rabbis, who count those who separate themselves from the community with heretics, and epikoruses, who deny the Torah, and Revival of the Dead, as it says in Masekhet Rosh Hashanah (17a)...

Thus the one who separates from the ways of the community leave society. And Hillel says that society is the main thing and not the private individual, for the individual is dynamic/changing, and these societies endure, as has been explained, for societal power endures without change.

(א) וַיְדַבֵּ֣ר ה' אֶל־מֹשֶׁ֥ה וְאֶֽל־אַהֲרֹ֖ן לֵאמֹֽר׃ (ב) אָדָ֗ם כִּֽי־יִהְיֶ֤ה בְעוֹר־בְּשָׂרוֹ֙ שְׂאֵ֤ת אֽוֹ־סַפַּ֙חַת֙ א֣וֹ בַהֶ֔רֶת וְהָיָ֥ה בְעוֹר־בְּשָׂר֖וֹ לְנֶ֣גַע צָרָ֑עַת וְהוּבָא֙ אֶל־אַהֲרֹ֣ן הַכֹּהֵ֔ן א֛וֹ אֶל־אַחַ֥ד מִבָּנָ֖יו הַכֹּהֲנִֽים׃ (ג) וְרָאָ֣ה הַכֹּהֵ֣ן אֶת־הַנֶּ֣גַע בְּעֽוֹר־הַ֠בָּשָׂר וְשֵׂעָ֨ר בַּנֶּ֜גַע הָפַ֣ךְ ׀ לָבָ֗ן וּמַרְאֵ֤ה הַנֶּ֙גַע֙ עָמֹק֙ מֵע֣וֹר בְּשָׂר֔וֹ נֶ֥גַע צָרַ֖עַת ה֑וּא וְרָאָ֥הוּ הַכֹּהֵ֖ן וְטִמֵּ֥א אֹתֽוֹ׃ (ד) וְאִם־בַּהֶרֶת֩ לְבָנָ֨ה הִ֜וא בְּע֣וֹר בְּשָׂר֗וֹ וְעָמֹק֙ אֵין־מַרְאֶ֣הָ מִן־הָע֔וֹר וּשְׂעָרָ֖ה לֹא־הָפַ֣ךְ לָבָ֑ן וְהִסְגִּ֧יר הַכֹּהֵ֛ן אֶת־הַנֶּ֖גַע שִׁבְעַ֥ת יָמִֽים׃ (ה) וְרָאָ֣הוּ הַכֹּהֵן֮ בַּיּ֣וֹם הַשְּׁבִיעִי֒ וְהִנֵּ֤ה הַנֶּ֙גַע֙ עָמַ֣ד בְּעֵינָ֔יו לֹֽא־פָשָׂ֥ה הַנֶּ֖גַע בָּע֑וֹר וְהִסְגִּיר֧וֹ הַכֹּהֵ֛ן שִׁבְעַ֥ת יָמִ֖ים שֵׁנִֽית׃ (ו) וְרָאָה֩ הַכֹּהֵ֨ן אֹת֜וֹ בַּיּ֣וֹם הַשְּׁבִיעִי֮ שֵׁנִית֒ וְהִנֵּה֙ כֵּהָ֣ה הַנֶּ֔גַע וְלֹא־פָשָׂ֥ה הַנֶּ֖גַע בָּע֑וֹר וְטִהֲר֤וֹ הַכֹּהֵן֙ מִסְפַּ֣חַת הִ֔יא וְכִבֶּ֥ס בְּגָדָ֖יו וְטָהֵֽר׃ (ז) וְאִם־פָּשֹׂ֨ה תִפְשֶׂ֤ה הַמִּסְפַּ֙חַת֙ בָּע֔וֹר אַחֲרֵ֧י הֵרָאֹת֛וֹ אֶל־הַכֹּהֵ֖ן לְטָהֳרָת֑וֹ וְנִרְאָ֥ה שֵׁנִ֖ית אֶל־הַכֹּהֵֽן׃

(1) The LORD spoke to Moses and Aaron, saying: (2) When a person has on the skin of his body a swelling, a rash, or a discoloration, and it develops into a scaly affection on the skin of his body, it shall be reported to Aaron the priest or to one of his sons, the priests.

(3) The priest shall examine the affection on the skin of his body: if hair in the affected patch has turned white and the affection appears to be deeper than the skin of his body, it is a leprous affection; when the priest sees it, he shall pronounce him unclean.

(4) But if it is a white discoloration on the skin of his body which does not appear to be deeper than the skin and the hair in it has not turned white, the priest shall isolate the affected person for seven days.

(5) On the seventh day the priest shall examine him, and if the affection has remained unchanged in color and the disease has not spread on the skin, the priest shall isolate him for another seven days. (6) On the seventh day the priest shall examine him again: if the affection has faded and has not spread on the skin, the priest shall pronounce him clean. It is a rash; he shall wash his clothes, and he shall be clean.

(7) But if the rash should spread on the skin after he has presented himself to the priest and been pronounced clean, he shall present himself again to the priest.

(א) וַיְדַבֵּ֥ר ה' אֶל־מֹשֶׁ֥ה לֵּאמֹֽר׃ (ב) זֹ֤את תִּֽהְיֶה֙ תּוֹרַ֣ת הַמְּצֹרָ֔ע בְּי֖וֹם טָהֳרָת֑וֹ וְהוּבָ֖א אֶל־הַכֹּהֵֽן׃ (ג) וְיָצָא֙ הַכֹּהֵ֔ן אֶל־מִח֖וּץ לַֽמַּחֲנֶ֑ה וְרָאָה֙ הַכֹּהֵ֔ן וְהִנֵּ֛ה נִרְפָּ֥א נֶֽגַע־הַצָּרַ֖עַת מִן־הַצָּרֽוּעַ׃ (ד) וְצִוָּה֙ הַכֹּהֵ֔ן וְלָקַ֧ח לַמִּטַּהֵ֛ר שְׁתֵּֽי־צִפֳּרִ֥ים חַיּ֖וֹת טְהֹר֑וֹת וְעֵ֣ץ אֶ֔רֶז וּשְׁנִ֥י תוֹלַ֖עַת וְאֵזֹֽב׃ (ה) וְצִוָּה֙ הַכֹּהֵ֔ן וְשָׁחַ֖ט אֶת־הַצִּפּ֣וֹר הָאֶחָ֑ת אֶל־כְּלִי־חֶ֖רֶשׂ עַל־מַ֥יִם חַיִּֽים׃ (ו) אֶת־הַצִּפֹּ֤ר הַֽחַיָּה֙ יִקַּ֣ח אֹתָ֔הּ וְאֶת־עֵ֥ץ הָאֶ֛רֶז וְאֶת־שְׁנִ֥י הַתּוֹלַ֖עַת וְאֶת־הָאֵזֹ֑ב וְטָבַ֨ל אוֹתָ֜ם וְאֵ֣ת ׀ הַצִּפֹּ֣ר הַֽחַיָּ֗ה בְּדַם֙ הַצִּפֹּ֣ר הַשְּׁחֻטָ֔ה עַ֖ל הַמַּ֥יִם הַֽחַיִּֽים׃ (ז) וְהִזָּ֗ה עַ֧ל הַמִּטַּהֵ֛ר מִן־הַצָּרַ֖עַת שֶׁ֣בַע פְּעָמִ֑ים וְטִ֣הֲר֔וֹ וְשִׁלַּ֛ח אֶת־הַצִּפֹּ֥ר הַֽחַיָּ֖ה עַל־פְּנֵ֥י הַשָּׂדֶֽה׃ (ח) וְכִבֶּס֩ הַמִּטַּהֵ֨ר אֶת־בְּגָדָ֜יו וְגִלַּ֣ח אֶת־כָּל־שְׂעָר֗וֹ וְרָחַ֤ץ בַּמַּ֙יִם֙ וְטָהֵ֔ר וְאַחַ֖ר יָב֣וֹא אֶל־הַֽמַּחֲנֶ֑ה וְיָשַׁ֛ב מִח֥וּץ לְאָהֳל֖וֹ שִׁבְעַ֥ת יָמִֽים׃ (ט) וְהָיָה֩ בַיּ֨וֹם הַשְּׁבִיעִ֜י יְגַלַּ֣ח אֶת־כָּל־שְׂעָר֗וֹ אֶת־רֹאשׁ֤וֹ וְאֶת־זְקָנוֹ֙ וְאֵת֙ גַּבֹּ֣ת עֵינָ֔יו וְאֶת־כָּל־שְׂעָר֖וֹ יְגַלֵּ֑חַ וְכִבֶּ֣ס אֶת־בְּגָדָ֗יו וְרָחַ֧ץ אֶת־בְּשָׂר֛וֹ בַּמַּ֖יִם וְטָהֵֽר׃ (י) וּבַיּ֣וֹם הַשְּׁמִינִ֗י יִקַּ֤ח שְׁנֵֽי־כְבָשִׂים֙ תְּמִימִ֔ים וְכַבְשָׂ֥ה אַחַ֛ת בַּת־שְׁנָתָ֖הּ תְּמִימָ֑ה וּשְׁלֹשָׁ֣ה עֶשְׂרֹנִ֗ים סֹ֤לֶת מִנְחָה֙ בְּלוּלָ֣ה בַשֶּׁ֔מֶן וְלֹ֥ג אֶחָ֖ד שָֽׁמֶן׃ (יא) וְהֶעֱמִ֞יד הַכֹּהֵ֣ן הַֽמְטַהֵ֗ר אֵ֛ת הָאִ֥ישׁ הַמִּטַּהֵ֖ר וְאֹתָ֑ם לִפְנֵ֣י ה' פֶּ֖תַח אֹ֥הֶל מוֹעֵֽד׃

(1) The LORD spoke to Moses, saying: (2) This shall be the ritual for a leper at the time that he is to be cleansed. When it has been reported to the priest,

(3) the priest shall go outside the camp. If the priest sees that the leper has been healed of his scaly affection, (4) the priest shall order two live clean birds, cedar wood, crimson stuff, and hyssop to be brought for him who is to be cleansed.

(5) The priest shall order one of the birds slaughtered over fresh water in an earthen vessel; (6) and he shall take the live bird, along with the cedar wood, the crimson stuff, and the hyssop, and dip them together with the live bird in the blood of the bird that was slaughtered over the fresh water.

(7) He shall then sprinkle it seven times on him who is to be cleansed of the eruption and cleanse him; and he shall set the live bird free in the open country. (8) The one to be cleansed shall wash his clothes, shave off all his hair, and bathe in water; then he shall be clean. After that he may enter the camp, but he must remain outside his tent seven days.

(9) On the seventh day he shall shave off all his hair—of head, beard, and eyebrows. When he has shaved off all his hair, he shall wash his clothes and bathe his body in water; then he shall be clean.

(10) On the eighth day he shall take two male lambs without blemish, one ewe lamb in its first year without blemish, three-tenths of a measure of choice flour with oil mixed in for a meal offering, and one log of oil.

(11) These shall be presented before the LORD, with the man to be cleansed, at the entrance of the Tent of Meeting, by the priest who performs the cleansing.