Between 1905 and 1910 new socialistic beliefs of a Syndicalist character began to be absorbed by sections of Trade Unionists, especially the miners and the engineers, who soon exhibited a spirit of revolt not only against the capitalistic system, but more especially against the limited aims of contemporary Trade Unionism. There commenced, and up to the beginning of the war, continued a definite struggle in the Labour movement between the constitutional Trade Unionists who held tight to their ideals of State Socialism, and the revolutionary industrial Unionists, led by James Connolly, and Tom Mann, who preached their doctrine of Syndicalism, advocating first the abolition of craft Unionism—the system under which all workmen of a particular craft, for example, engineers, are enrolled in their own craft Unions irrespective of the industries in which they work—and its replacement by industrial Unionism, that is to say, the enrolment in one Trade Union representing each industry of all men engaged in that industry irrespective of their particular craft or occupations, such as to a limited extent prevails in the railway, mining and transport industries; secondly, the appropriation of the means of production in each industry by the manual workers who would produce the output, charge the price and conduct the industry. Connolly, who was afterwards executed for complicity in the Irish Rebellion of 1916, came from the United States of America in 1905, and persuaded the Socialist Labour Party of Glasgow to link up forces with the American Industrial Workers of the World. Mann, who was recently the Secretary of the Amalgamated Engineering Union, brought the seeds of revolutionary Syndicalism from Paris and sowed them personally by means of a widespread campaign.