In the past few decades, by research using the League Archives at Geneva, historians have reviewed the legacy of the League of Nations as the United Nations has faced similar troubles to those of the interwar period. Current consensus views that, even though the League failed to achieve its ultimate goal of world peace, it did manage to build new roads towards expanding the rule of law across the globe; strengthened the concept of collective security, giving a voice to smaller nations; helped to raise awareness to problems like epidemics, slavery, child labour, colonial tyranny, refugee crises and general working conditions through its numerous commissions and committees; and paved the way for new forms of statehood, as the mandate system put the colonial powers under international observation.