请翻译成英文：亚当·斯密是英国18 世纪中叶工场手工业鼎盛时期成长起来的古典政治经济学的奠基人也是苏格兰古典伦理学的伟大代表。他对人类文明的最大贡献莫过于创立了经济自由主义学说体系他对人类文明的又一贡献则是在回应时代呼声时所阐述的合宜美德论他所阐述的合理利己和高尚利他相结合的人性论也具有积极意义。

Adam Smith, the founder of classical political economy during the heyday of British cottage industry in the mid-18th century, was also a great representative of Scottish classical ethics. His greatest contribution to human civilization lies in establishing the doctrine of economic liberalism. Another contribution he made to human civilization is his theory of "propriety and virtue", which responds to the call of the times. His theory of combining rational self-interest with noble altruism also has positive significance