Why Russia is Worried About the “Zero Option” in Afghanistan

Why Russia is Worried About the “Zero Option” in Afghanistan | The Editor | The Diplomat: 
"Russia watched first-hand as Afghanistan descended into chaos and anarchy following its withdrawal in February 1989, enacting its own “Zero Option.” The slow decay of Afghanistan’s institutions and ruling mechanisms led to not only the eventual takeover of the country by the Taliban, but the growth in drug production and the spread of radical Islamist ideologies to Central Asia—particularly Tajikistan, which waged a civil war throughout most of the 1990s."