Final answer:
The League of Nations aimed to prevent wars through collective security but was weakened by its lack of enforcement power and military capabilities, leading to its replacement by the United Nations.
Step-by-step explanation:
League of Nations Goals, Strengths, and Weaknesses
The major goals of the League of Nations included promoting global security and preventing future wars through the principle of collective security. This entailed that member nations would treat an attack on one member as an attack on all, thus deterring future aggression. Despite this high ideal, the League faced significant weaknesses, such as its lack of enforcement power, its inability to compel members to act militarily or economically, and key nations like the United States never joining. The strengths of the League lay in its collective approach to security and its potential for international diplomacy and deliberation over global issues. Nevertheless, the League's deficiencies, particularly its lack of enforcement mechanisms and limited military capability, greatly undermined its effectiveness and led to its eventual replacement by the United Nations after the Second World War.