With Russia threatening the Ukraine border, the US and other NATO countries pulled their people out. Military, diplomat, civilian - all out.<p>This cleared the space so that when Putin attacked, there would be no NATO personnel in the line of fire, and no excuse for a war.<p>If there was any interest in preventing what is going on, those people would not have been pulled out, and instead, additional exercises with Ukraine would have been conducted, sending a strong message to Putin.<p>Instead, a vacuum was created that would be hard for someone like Putin to resist.<p>It's now pretty much too late, except for possibly establishing a no-fly zone in the west of Ukraine to deal with the humanitarian crisis. But, you would need some leadership ability to do that, and that is severely lacking.