美国在商业扩张中诞生,在领土扩张中成长。威廉·亨利·西沃德在继承和发展先辈扩张主义观点的同时,把握住了时代的脉搏,通过对实践活动的提炼和思考,勾勒了美国在太平洋地区建立商业帝国的宏伟蓝图,第一次完整地构建了美国海外扩张的理论,为19世纪末20世纪初美国制定“门户开放”政策和大踏步走向海外奠定了基础。 The United States was born in commercial expansion and grew up in territorial expansion. William Henry Seward, while inheriting and developing the concept of ancestral expansionism, grasps the pulse of the times and sketches the grand blueprint for the establishment of a commercial empire in the Pacific through the refinement and reflection of practical activities. For the first time It has completely constructed the theory of the overseas expansion of the United States and laid the foundation for the United States to formulate the “open door” policy and make great strides toward overseas in the late 19th and early 20th centuries.