Is the economics of libertarianism good?

Is the economics of libertarianism good? 

Their main economic idea is spontaneous order. 

"Simply stated, the idea holds that when groups of individuals are left alone, without government oversight or regulation, they will spontaneously form a social and economic order that is superior in organization, efficiency, and the conveyance of information than an order arranged from the top down through centralized planning." 

This debate is about if it is good. 

For=Yes, it is good

Against=No, it is not good

Round 1: Arguments/points

Round 2: Counter-arguments

Round 3: Sum up points and counter-arguments. Clarify points that were countered but make it short. 

(Ex: Round 1 opp: Trucks are bad because they emit carbon. Carbon is bad because of x, y, and z. Round 2 for: False, carbon is not real because of x. Round 3 opp: Nope. Here are studies and evidence.)