Workers from all over the world could struggle together, join their forces to make it with the current lack of jobs, to resist to their exploitation by the capitalists. A bit less than a century ago workers of Eastern European countries united in a communist move. Half a century ago laborers of different countries saw their unions uniting in The International Trade Union Confederation, the world's largest trade union federation.
In the headline you mentioned, Gwendo, I think "unite" is an intransitive verb meaning "come together, join, meet with each other".
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20 Sept. 2009