Intro to the Oldest Religion Known to man kind

       The oldest religion known to mankind is the Noachide covenant between the creator, blessed eternal one, and the children of Noach.  The following is from Rambam's Mishneh Torah.  Laws of Kings Chpt. 9:1.

1 Adam HaRishon was commanded in six things:

• [the prohibition] concerning idolatry
• [the prohibition] concerning blasphemy
• [the prohibition] concerning spilling of blood
• [the prohibition] concerning forbidden relations
• [the prohibition] concerning robbery
• and [the injunction of establishing courts of] justice.

Even though all these were received into our hands from Moshe Rabbenu, and the intellect naturally inclines towards them – from a general reading of the words of Torah, they can see that they were commanded in these. [G-d] added to Noah [the commandment] concerning a torn limb, as it is written "From the flesh, its life is in the blood, do not eat" (Genesis 9:4). This makes seven commandments. This is how matters stood in the world until Avraham. Avraham came and was commanded other things beyond this, in circumcision and he prayed the morning prayers. Yitzchak began tithing, and added the afternoon prayers. Yaakov added [the prohibition of not eating] the sciatic nerve and prayed the evening prayers. In Egypt, Amram was commanded other things, untilMoshe Rabbenu came and completed [the giving] of the Torah, by his hand.

From a general reading says Rambam you should be able to see the things that gentiles were commanded.  How you ask?  Well by simple deduction.  First rule is, to know that the Blessed One does not punish with out warning.  There fore all the things the gentiles are punished for through out the Torah they must have been warned about in the form of a formal commandment.  We will start to explore examples of this as we progress.  Can you guess what the generation of the flood was punished for?  How about Caanan the son of Cham?  How bout Sodom and Ghamorah?