India and Pakistan have seemingly pulled back from the edge of nuclear war for now. But the reasons for their quarrel, dating back to their violent birth as separate countries with the British withdrawal from the subcontinent in 1947, remain.
Psychologically obsessed with each other, they have fought four wars since then. They continue to ratchet up their nuclear and missile capabilities by conducting missile tests periodically. Every few years, they get into a tense stand-off and withdraw from the brink of a nuclear holocaust only after interventions from the international community. They lob threats at each other regularly.