For 10 points, name this pamphlet by the Abbe Sieyes.
In an attempt to define a nation, this work argues that a nation is a "body of associates, living under a common law, and represented by the same legislature." Another section of this work describes how merchants and bankers are the intermediary agents between production and consumption useful for both purposes. This work describes how there are four unrecognized heads currently: the sword, the robe, the church and administration. This work warns about an approaching (*) imperium in imperia, and reaches the conclusion that the titular group is "necessary for the nation." This work begins by declaring that "public functions" and "individual efforts" are necessary for a nation to prosper, before answering the main question by saying "it is the whole."  For 10 points, name this pamphlet by the Abbe Sieyes.
In an attempt to define a nation, this work argues that a nation is a "body of associates, living under a common law, and represented by the same legislature."
{What} is the {Third Estate?} [or {Qu'est}-{ce que} le {tiers}-{état?}]