Why would the allies win world war 1 if the US would not have intervened?

Even without U.S. intervention, the Allies had significant advantages, including greater industrial capacity, larger populations, and established supply lines. The Central Powers were facing resource shortages and internal dissent, which weakened their position. Additionally, the Allies had effective military strategies and were able to regroup after setbacks, suggesting they could have ultimately worn down the Central Powers over time. However, the conflict would likely have lasted longer and resulted in even greater casualties.