一、缔约互保，避免战争是东南社会经济发展的需要由于地理环境，气候条件的差异，我国南北之间在社会经济发展水平上存在很大的差距。东南沿海地处亚热带，土地肥沃，雨量充沛，经济水平较高，商业发达，人们的经世意识很强。相对而言，北方则气候干旱，生产落后，自然经济一 I. Mutual Treaty and Mutual Protection and War Avoidance Needed for Social and Economic Development in Southeast China Due to the differences in geographical environment and climatic conditions, there is a big gap between our country in social and economic development. Southeast coast is located in the subtropical, fertile land, abundant rainfall, higher economic level, commercial development, people’s strong sense of world economy. Relatively speaking, the climate in the north is arid, with backward production and natural economy