" To some extent, the direction of one's chosen path automatically selects for the paths that may cross it. A warriors path will intersect the paths of other warriors, allies and enemies alike. A workers path will interest the paths of other workers. But as with games of cards and dice, sometimes unexpected crossings occur. Some are driven by chance, others by design, others by a change in one's goal. Some are driven by malice. Such manipulations can prove effective in the short term. But the longer-term consequences can be perilously difficult to predict. "