Small businesses are essential in providing employment for workers who might otherwise be locked out of the mainstream economy. Small firms also drive large firms to compete for workers, thus driving up wages.
Disagreements between libertarians and realists are a problem. But in the current interventionist-dominated environment, the disagreements don't strike me as an especially big problem — at least for now.
The socialist and anti-liberal movements we now face comes to use from intellectuals, aristocrats, and other elites. The "proletariat" has had no role in devising the movements we're told serve the interests of "the people."