The short answer is no, they are not. While a lot of historical analysis has been spent in trying to deny the extent and impact of the enclosures, the simple fact is (in the words of noted historian E.P. Thompson) enclosure "was a plain enough case of class robbery, played according to the fair rules of property and law laid down by a parliament of property-owners and lawyers." [The Making of the English Working Class, pp. 237-8]
The enclosures were one of the ways that the "land monopoly" was created. The land monopoly was used to refer to capitalist property rights and ownership of land by (among others) the Individualist Anarchists. Instead of an "occupancy and use" regime advocated by anarchists, the land monopoly allowed a few to bar the many from the land — so creating a class of people with nothing to sell but their labour. While this monopoly is less important these days in developed nations (few people know how to farm) it was essential as a means of consolidating capitalism. Given the choice, most people preferred to become independent farmers rather than wage workers (see next section).
However, the importance of the enclosure movement is downplayed by supporters of capitalism. Little wonder, for it is something of an embarrassment for them to acknowledge that the creation of capitalism was somewhat less than "immaculate" — after all, capitalism is portrayed as an almost ideal society of freedom. To find out that an idol has feet of clay and that we are still living with the impact of its origins is something pro-capitalists must deny. So is the enclosures a socialist myth? Most claims that it is flow from the work of the historian J.D. Chambers' famous essay "Enclosures and the Labour Supply in the Industrial Revolution." [Economic History Review, 2nd series, no. 5, August 1953] In this essay, Chambers attempts to refute Karl Marx's account of the enclosures and the role it played in what Marx called "primitive accumulation."
We cannot be expected to provide an extensive account of the debate that has raged over this issue. All we can do is provide a summary of the work of William Lazonick who presented an excellent reply to those who claim that the enclosures were an unimportant historical event. We are drawing upon his summary of his excellent essay "Karl Marx and Enclosures in England" [Review of Radical Political Economy, no. 6, Summer, 1974] which can be found in his books Competitive Advantage on the Shop Floor and Business Organisation and the Myth of the Market Economy. There are three main claims against the socialist account of the enclosures. We will cover each in turn.
Firstly, it is often claimed that the enclosures drove the uprooted cottager and small peasant into industry. However, this was never claimed. It is correct that the agricultural revolution associated with the enclosures increased the demand for farm labour as claimed by Chambers and others. And this is the whole point - enclosures created a pool of dispossessed labourers who had to sell their time/liberty to survive. The "critical transformation was not the level of agricultural employment before and after enclosure but the changes in employment relations caused by the reorganisation of landholdings and the reallocation of access to land." [Competitive Advantage on the Shop Floor, p. 30] Thus the key feature of the enclosures was that it created a supply for farm labour, a supply that had no choice but to work for another. This would drive down wages and increase demand. Moreover, freed from the land, these workers could later move to the towns in search for better work.
Secondly, it is argued that the number of small farm owners increased, or at least did not greatly decline, and so the enclosure movement was unimportant. Again, this misses the point. Small farm owners can still employ wage workers (i.e. become capitalist farmers as opposed to "yeomen" — independent peasant proprietor). As Lazonick notes, "[i]t is true that after 1750 some petty proprietors continued to occupy and work their own land. But in a world of capitalist agriculture, the yeomanry no longer played an important role in determining the course of capitalist agriculture. As a social class that could influence the evolution of British economy society, the yeomanry had disappeared." [Op. Cit., p. 32]
Thirdly, it is often claimed that it was population growth, rather than enclosures, that caused the supply of wage workers. So was population growth more important that enclosures? Maurice Dobbs argues that "the centuries in which a proletariat was most rapidly recruited were apt to be those of slow rather than of rapid natural increase of population, and the paucity or plenitude of a labour reserve in different countries was not correlated with comparable difference in their rates of population-growth." [Studies in Capitalist Development, p. 223] Moreover, the population argument ignores the question of whether the changes in society caused by enclosures and the rise of capitalism have an impact on the observed trends towards earlier marriage and larger families after 1750. Lazonick argues that "[t]here is reason to believe that they did." [Op. Cit., p. 33] Also, of course, the use of child labour in the factories created an economic incentive to have more children, an incentive created by the developing capitalist system. Overall, Lazonick notes that "[t]o argue that population growth created the industrial labour supply is to ignore these momentous social transformations" associated with the rise of capitalism. [Business Organisation and the Myth of the Market Economy, p. 273]
In other words, there is good reason to think that the enclosures, far from being some kind of socialist myth, in fact played a key role in the development of capitalism. As Lazonick himself notes, "Chambers misunderstood" "the argument concerning the 'institutional creation' of a proletarianised (i.e. landless) workforce. Indeed, Chamber's own evidence and logic tend to support the Marxian [and anarchist!] argument, when it is properly understood." [Op. Cit., p. 273]