Tensions between India and China are rising again. This summer, the two countries’ militaries clashed in Ladakh along the Line of Control, their contested border in the Himalaya region. The loss of more than 30 lives sobered both governments, prompting military talks that made little progress. Late last month, there was another confrontation between the two armies — fortunately verbal, not physical — that underscored the fragility of the cease-fire.

Hostility is infecting the broader relationship. The general public in both countries are increasingly antagonistic to the other and the Delhi government has launched an economic offensive against its northern neighbor. Since both nations are headed by nationalists, the prospect of more clashes and escalation is real.

India and China have long contested their 3,500-km border, the Line of Control. They fought a war in 1962 (which India lost) and have clashed several times since. The possibility of escalation prompted them to adopt rules of engagement in 1993 in which both sides banned border patrols from using firearms.