Iran–Israel War – Causes, Nuclear Trigger & Regional Impact | UPSC GS 2

Core Thesis

The Iran–Israel war is not sudden. It is the culmination of decades of ideological hostility, proxy conflict, failed nuclear diplomacy and recent regional destabilisation.

Historical Evolution

  • Pre-1979: Iran (Shah era) had working ties with Israel and the U.S.
  • 1979 Islamic Revolution: Iran became ideologically anti-Israel and anti-U.S.
  • Israel began treating Iran as a long-term existential threat.

Proxy War Phase

For decades, confrontation remained indirect:

Iran:

  • Built regional network (Hezbollah, Hamas, allied militias)
  • Used proxies to pressure Israel

Israel:

  • Airstrikes in Syria
  • Targeted Iranian assets
  • Prevented Iranian entrenchment near borders

Nuclear Trigger

  • Iran expanded uranium enrichment
  • 2015 nuclear deal collapsed after U.S. withdrawal
  • Israel considers nuclear-capable Iran unacceptable

Immediate Escalation (2025–26)

  • Gaza war reshaped Israeli security thinking
  • Syrian instability exposed Iranian networks
  • Oman mediation failed
  • Israel launched pre-emptive strikes
  • Iran retaliated with direct missile attacks

Shift: Proxy war → Open confrontation

Strategic Objectives

Israel:

  • Degrade nuclear capability
  • Dismantle militia infrastructure
  • Restore deterrence

Iran:

  • Preserve regime
  • Maintain regional influence
  • Avoid strategic humiliation

Wider Implications

  • Strait of Hormuz risk
  • U.S. involvement deepening
  • Gulf states cautious
  • Long-term regional instability
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