Capitalism depends on constant growth. A country’s economy is rated based on how much it grows. (Rule of Acquisition number 45: Expand or die) This growth requires a constant increase in production and therefore resource consumption. Resources are finite. That right there, at the core of the system, disqualifies it from being a long term solution. Then you must not forget that laissez faire capitalism inevitably leads to a cycle of growth and total economic collapse. It happened once already and without government intervention it almost happened again just recently (coincidentally, from the same country). The system puts short term profits over long term stability, the other factor disqualifying it from being a long term solution.