Rabbi Yaakov Kaminetzky writes about vegetarianism in his Emes LiYaakov on Pirkei Avos, chapter 5 regarding the ten generations from Adam to Noach etc.
He mentions the idea of Ramban of why meat became permitted after the flood. Then he goes on to discuss the subject at hand. The following is my translation.
We must remember that the opinion of Torah ...
The answer draws extensively on Hakhel Email Community Awareness Bulletin, FOCUS ON TEFILLAH ARCHIVE .
In the blessing in the Amidah of “Velamalshinim” the original purpose was to remove from our midst any and all heretical teachings and thoughts. The author starts with the approach that:
We do not daven necessarily that the evildoers be eradicated.
According to Maimonides, G-d is not involved in the world. Thus, G-d promised nothing per se. A rational approach would be that people should work to create a messianic age, not sit back passively, expecting G-d to perform a miracle. Indeed, we are told not to rely on miracles. However, G-d does help people who help themselves.
 Rambam understood ...
Reward and punishment is a basic belief of Judaism so if someone does the right things he is owed their reward.
The question is if will be given or can there be any expectation of it in this world. The answer seems to be for the most part, no.It depends on pre determined mazal and other factors.
The Gemara Moed Katan 28A says:
אמר רבא חיי בני ומזוני לא ...
The Torah says:
If you follow My statutes and observe My commandments and perform them, I will give your rains in their time, the land will yield its produce, and the tree of the field will give forth its fruit…
You will eat your food to satiety, and you will live in security in your land.
And I will grant peace in the land, and you will lie down ...
Not an answer, but a source that IMHO have to be considered when approaching this subject:
סנהדרין סה ב
רבא ברא גברא שדריה לקמיה דר' זירא הוה קא משתעי בהדיה ולא הוה קא מהדר ליה אמר ליה מן חבריא את הדר לעפריך
Rava created a "man", and sent it to Rabbi Zeira. He tried to talk to the "man", but it didn't reply. He said, you came from the "...
Some genetic alternation is allowed (adviced, even), for avoiding unwanted traits:
בכורות מה ב
אמר ר"ל גבוה לא ישא גבוהית שמא יצא מהן תורן ננס לא ישא ננסת שמא יצא
מהם אצבעי לבן לא ישא לבנה שמא יצא מהם בוהק שחור לא ישא שחורה שמא יצא
Reish Lakish said: Tall man shouldn't marry tall woman, for their child might be "flagpole" ...
The premise behind this question is questionable. While some Rabbis may be of the opinion there is no life on other planets I doubt any of them would view their opinion on the issue as one of the Ikerey Emunah.
Assuming a new species that has distinctive features and can not interbreed with humans but can breed with other creatures like it and isn't just a ...