View source for The Shipwreck and Rabbeinu Gershom

== Facts of the Case ==
A group of Jewish merchant were traveling down a river in Germany in a barge. The barge sank, but everyone onboard was saved. However, the barge was lost with all the precious cargo onboard. One of the Jewish merchants hires a diver to help save some of the cargo. The diver was able to pull out a chest of goods, but he has to break it because of its heavy weight. The merchant and the diver attempt to save as much of the lost cargo as possible. However, because of the low visibility and the dangers of saving, the merchant and the diver put off their search until the next day. Over the night, a group of gentiles broke into the ruin and stole a large group of cargo. In the morning, the Jewish merchants attempt to recover the lost cargo by bribing local judges and nobility to make a court order demanding the return of all stolen cargo. The Jewish merchants also succeed in convincing the nearby Jewish communities to make a decree demanding the return of the stolen items. 

Within a month of the sinking, a member of the Jewish community is discovered to have bought a stolen gem<ref>Different words are used for the stolen item in different kitvei yad. In the Eidelberg edition, he quotes the word יוהר. This obscure term was first used by the paytanim, and it refers to a particular gem. The history of the word and attempts to indentify it are described in the following article. [https://www.jstor.org/stable/pdf/23608253.pdf?refreqid=fastly-default%3A9c39b81466fe5cd344f200751f348776&ab_segments=&initiator=&acceptTC=1 Yohar: The transformations of a Middle-Persian Word in Judaeo-Arabic and in Medieval Hebrew]</ref> from one of the shipwreck thieves. The purchaser of the stolen gem refuses to return it to its owner, claiming that the gem is made owner-less by the shipwreck, and the decrees are ineffective. 

== Historical Background ==

== Rabbeinu Gershom's Decision ==
Rabbeinu Gershom ruled that the buyer of the stolen gem had to return it to its owner. His argument is somewhat difficult to follow and much debated by future generations. 

The buyer argued that according to the straight letter of halacha the gem had become ownerless in the shipwreck. The gemara indeed says that which is lost in the river becomes permitted. Further, if the owner despaires of the loss of his item (yeush), the finder need not return the item. It is unclear how Rabbeinu Gershom responds to either of these arguments, and if decision is based on a rejection of these arguments, or rather, is based on the overriding decrees of the communities. 

Rabbeinu Gershom ruled that both the decree of the nobility and the decree of the Jewish communities were effective. 

Rabbeinu Gershom stated clearly that Dina demalchuta Dina was applicable to this case. 

Rabbeinu Gershom also ruled that the communal decree had power because of the principle of hefker beit din hefker. Rabbeinu Gershom understands this principle to be applicable not only to Batei Dinim, but to the Jewish communal heads.. 

== Rabbeinu Gershom's View on Authority of Court ==
Rabbeinu Gershom says that the communal decree has authority because ''hefker beit din hefker''. Rabbeinu Gershom goes on to reject the assumption that the power to repossess is limited only to batei dinim of special authority. He quotes that the Talmudic statement "Yiftach in his generation, like Shmuel in his generation," which gives authority to the rulings of generational leaders, even if those leaders are lacking the intellectual prowess of their predecessors. Rabbeinu Gershom understands this statement to give full powers to every communal leader, even if they themselves are not the leaders of the generation. This point is an immense view on the power of the community. 

In order to have a clearer sense of the power Rabbeinu Gershom granted the community, let us contrast his view to that of Rabbeinu Tam. The Mordechai<ref>Mordechai Bava Batra Remez 480</ref> quotes Rabbeinu Tam saying that a community can only fine and enact legislation if the entire community had agreed to legislation. Rabbeinu Tam goes on to say "if they made no such agreement, the city has no power to force a resident to do what they what." Rabbeinu Tam then goes on to say that the rule of ''hefker beit din hefker'' is not applicable, since only courts of great rabbis have that ability. Rabbeinu Tam understands that Talmudic statement "Yiftach in his generation, like Shmuel in his generation" to grant ultimate authority to the greatest rabbis of each generation.  

In contrast to Rabbeinu Tam, Rabbeinu Gershom understood the "Yiftach" statement to grant the same expropriation power to the leaders of every single community. We can perhaps suggest a reason for the dispute- Rabbeinu Tam sees the entire Jewish community as one, and bound to a single leader- the gadol hador (great man of the generation). In contrastion, Rabbeinu Gershom sees each community as individually requiring leadership. To Rabbeinu Tam- local government is only created by collective agreement. In contrast, to Rabbeinu Gershom, there is a preexisting institution of local government that is empowered not by consent, but has authority in itself. Rabbeinu Tam agrees that the Jewish world has a default leadership, but only on the national level- the ''gadol hador''.  

A further distinction worthy of note is the lay nature of leadership to Rabbeinu Gershom. Rabbeinu Gershom grants the governing board of a community the power of a court- but he does not describe particular requirement such as that expected of a judge. In contrast, Rabbeinu Tam grants ultimate power to the court of the greatest scholars of the generation. Rabbeinu Tam does envision laymen having power over communal affairs, but only by the unanimous consent of the community. To Rabbeinu Tam- local government must be created ''ex nihilo'' it cannot exist on majority rule alone.   

== Rabbeinu Gershom's View on Authority of the State ==
Rabbeinu Gershom's ruling is unique in the power it grants the state. Rabbeinu Gershom asserts that stolen gem must be returned because of the local noble court's ruling. This ruling grants exceptional power to the local secular government, and is much disputed by later commentators. 

To begin, we must examine the gemara's statements about the power of the state, and the understanding of subsequent commentators. The gemara quotes the principle Dina demalchuta Dina (the rule of the kingdom is the law) in four places.

# To mandate paying of taxes
# to permit using public works built using wood and land taken from citizens
# To prohibit taking land which is not considered sold by Jewish law, but is considered sold under state law
# in a dispute whether Dina demalchuta Dina would suffice to grant legal weight to contracts drawn up in a state court.

This principle is interpreted in a limited way by many commentators. Some assert that the government only has authority with regulations relating to land use, because of the state's ultimate right as owner over the land. Other argue that the principle should be seen widely as giving the king power of legislation but only in specific circumstance. They argue that ruler only has power to enforce prexisting regulations which are derived from their predecessors and written in the books of law. This opinion gives no weight to enacting legislation, only enforcement of the existing rules.

Others assert that the principle only grants authority to royal proclamations that relate to the welfare of the monarchy as a whole. This opinion argues that Dina demalchuta Dina is not applicable to the adjucation of courts. Instead Dina demalchuta Dina is only effective with regards to policy enactments of the monarch.

Even according to the opinions which grant weight to Dina demalchut Dina in all the above mentioned cases- many commenators express the opinion that Dina demalchuta Dina does not apply in cases of civil dispute between two Jews. These commentators assert the ultimate power of the Torah as the sole code of the Jewish people and consider usage of secular law in interpersonal disputes to be a disgrace. Going further- some opinions permit Dina demalchuta Dina in cases of civil dispute, but only where the ruling does not go against the Torah.


I have seen it necessary to describe the vast multitude of opinions in order that we may understand the impact of Rabbeinu Gershom's ruling. Rabbeinu Gershom mandates the return of the gem on the weight of the authority of the local courts, enforcing a particular declaration. The rulings of these local courts seems to contravene halacha. Indeed, as the claimant declares, an object lost at sea becomes owner less according to the straight letter of halacha. There is no requirement for the item to be return, and the recover of the lost item is full owner. In this case, Rabbeinu Gershom is imposing a ruling that goes against the straight letter of halacha. Some propose an answer limiting Rabbeinu Gershom's ruling, based on a different interpretation of the tshuva. However- according to the default reading, how is Rabbeinu Gershom to be understood.