Laclau and Mouffe are seen as the most influential post-Marxists, claiming to deconstruct Marx' categories, above all in their book "Hegemony and Socialist Strategy". Now, they are quite influential and well-known, but their writing could be called "opaque" - as a sociologist, I have a hard time following their arguments. Maybe you could help me putting in clear terms how exactly Laclau's postmarxism is different from other Marxist theories? In what way do Laclau and Mouffe succeed in deconstructing Marx - beyond this nice talk on "radical democracy"?