India and Pakistan have seemingly pulled back from the brink again. But so much was new about the nuclear-armed enemies’ chaotic four-day clash, and so many of the underlying accelerants remain volatile, that there’s little to suggest that the truce represents any return to old patterns of restraint.

A new generation of military technology fueled a dizzying aerial escalation. Waves of airstrikes and antiaircraft volleys with modern weapons set the stage. Soon they were joined by weaponized drones en masse for the first time along the old Line of Control in Kashmir — hundreds of them in the sky, probing each nation’s defenses and striking without risk to any pilot.

Then the missiles and drones were streaking past the border areas and deep into India’s and Pakistan’s territories, directly hitting air and defense bases, prompting dire threats and the highest level of military alert.

Only then did international diplomacy — a crucial factor in past pullbacks between India and Pakistan — seem to engage in earnest, at what felt like the last minute before catastrophe. In a new global chapter defined by perilous conflicts, distracted leaders and a retreating sense of international responsibility to keep peace, the safety net had never seemed thinner.

Streaks of light in the sky as Indian air defense system engaged in Jammu on Saturday.Credit…Anindito Mukherjee/Getty Images

“Going back historically, many of the India-Pakistan conflicts have been stopped because of external intervention,” said Srinath Raghavan, a military historian and strategic analyst.