Discussion of what exactly Keith?

Was it desirable to defeat the Taleban and drive them from power?

Most certainly, from the point of view of the majority of people living in Afghanistan, for the region and the world as a whole.

Are things improving in Afghanistan as a result of intervention by the international community?

Undoubtedly, after a period of continuous conflict spanning thirty years, conditions within Afghanistan's borders could hardly have deteriorated. As a direct consequence of international intervention in October 2001 things are definitely improving right across the board in Afghanistan, that is undeniable, whether it is as good as it could be is a matter of opinion. Progress would undoubtedly have been much improved had the Taleban not elected to fight the reconstruction effort and UNAMA programmes in 2006.

Will an Afghanistan that has been returned to stable goverment and capable of defending itself from being usurped by fundamental terrorist organisations be in the best interests of the people of Afghanistan and the international community?

Of course it will.

Will any of the above come to pass if the international community pulls out of Afghanistan as rapidly as possible?

Not a hope in hell, all the above would do would be to create a horrendous human catastrophe. Potentially costing the lives of some 8.8 million people and committing the population of Afghanistan and the region to an endless civil war.