So do we have to conclude that historical analysis teaches us no useful lessons? Do we have to return to the abstract reasoning of Mandeville and some of his successors, including John Maynard Keynes, who thought that there were reasons to expect that austerity would produce depressions?
因此我们是否就可以认为那些历史分析并无教益？我们是否应该回到曼德维尔及其某些继承者（包括凯恩斯）的抽象推理方式，认为有理由去预期紧缩政策将导致衰退？