罗纳德·德沃金对法律原则问题的研究贡献甚巨,但是,他的理论依然面临来自两方面的难题:首先,他的理论中存在很大的道德难题,特别是在一个道德多元的社会中;其次,他的“权衡”方法很难避免“自由裁量权”的适用,依然难以约束法官的“造法”权力。 Ronald Dworkin made a great contribution to the study of legal principles, but his theory still faces two problems: first, there is a great moral problem in his theory, especially in a moral pluralism Secondly, it is difficult for his “trade-off” method to avoid the application of “discretionary power” and it is still difficult to constrain the judge’s “power of lawmaking.”