After the US withdrawal from Afghanistan, an attempt is being made to find out why the world's most powerful country, which has the latest army, state-of-the-art technology and state-of-the-art air force, could not defeat the Taliban.American intellectuals wonder why the United States cannot win wars in modern times.
The question is also whether the withdrawal of US troops will end US involvement in Afghanistan, especially at a time when China and Russia have increasingly established ties with the Taliban.
In defense of the United States, some argue that the United States has had many successes in Afghanistan and Iraq.
Tom Cassidy, a professor at the University of Chicago, says: "The US military has found Osama bin Laden and killed him, destroyed al Qaeda, and many of its leaders have been killed or captured.
"Infrastructure has been developed in Afghanistan, schools have been opened for women's education. An educated middle class emerged. Dangerous terrorists such as the so-called Islamic State militant group were destroyed in Iraq, and dictators such as Saddam Hussein and Colonel Gaddafi were overthrown in Libya & Iraq. What are these achievements less?'
Five major American wars since 1945
But there is a consensus in the United States that the United States has failed to root out terrorists in Afghanistan, Syria, Iraq and Yemen. The Taliban's victory in the war and return to power is the greatest proof of America's failure.