What was the primary concern regarding the League of Nations in the 1930s?

In the 1930s, the primary concern regarding the League of Nations was its inability to prevent aggression by member states. This period was marked by several instances of international conflict and territorial aggression, such as Japan's invasion of Manchuria in 1931 and Italy's invasion of Ethiopia in 1935. The League's failure to take effective action against these aggressors undermined its credibility and revealed significant weaknesses in its structure and decision-making processes. Member states often prioritized national interests over collective security, leading to inaction and signaling to aggressive powers that they could act without fear of repercussions.

While there were concerns about the League's support or relation to certain nations, including Nazi Germany, this did not dominate discussions about its overall effectiveness in the 1930s. The League was increasingly viewed as a paper tiger, lacking the authority and military backing necessary to enforce its resolutions. Additionally, although it had some successes in smaller disputes, these were overshadowed by its failures in more significant conflicts. Expansion to include more countries was also not a primary concern compared to the pressing issues of aggression and the League's ineffectiveness in maintaining peace and security.