There were two legal doctrines long invoked by the English courts against combined action--doctrines that became a heritage of the United States and have had a profound effect upon the labor movements in America. The first of these was the doctrine of conspiracy, a doctrine so ancient that its sources are obscure. It was the natural product of a government and of a time that looked askance at all combined action, fearing sedition, intrigue, and revolution. As far back as 1305 there was enacted a statute defining conspiracy and outlining the offense. It did not aim at any definite social class but embraced all persons who combined for a "malicious enterprise." Such an enterprise was the breaking of a law. So when Parliament passed acts regulating wages, conditions of employment, or prices of commodities, those who combined secretly or openly to circumvent the act, to raise wages or lower them, or to raise prices and curtail markets, at once fell under the ban of conspiracy. The law operated alike on conspiring employers and conniving employees. The new class of employers during the early years of the machine age eagerly embraced the doctrine of conspiracy. They readily brought under the legal definition the secret connivings of the wage-earners. Political conditions now also worked against the laboring class. The unrest in the colonies that culminated in the independence of America and the fury of the French Revolution combined to make kings and aristocracies wary of all organizations and associations of plain folk. And when we add to this the favor which the new employing class, the industrial masters, were able to extort from the governing class, because of their power over foreign trade and domestic finance, we can understand the compulsory laws at length declaring against all combinations of working men. The second legal doctrine which Americans have inherited from England and which has played a leading role in labor controversies is the doctrine that declares unlawful all combinations in restraint of trade. Like its twin doctrine of conspiracy, it is of remote historical origin. One of the earliest uses, perhaps the first use, of the term by Parliament was in the statute of 1436 forbidding guilds and trading companies from adopting by-laws "in restraint of trade," and forbidding practices in price manipulations "for their own profit and to the common hurt of the people." This doctrine thus early invoked, and repeatedly reasserted against combinations of traders and masters, was incorporated in the general statute of 1800 which declared all combinations of journeymen illegal. But in spite of legal doctrines, of innumerable laws and court decisions, strikes and combinations multiplied, and devices were found for evading statutory wages.