SALT I Treaty

How It Works

The SALT I Treaty, signed in 1972, was a groundbreaking agreement between the United States and the Soviet Union aimed at curbing the nuclear arms race during the Cold War. It specifically limited the number of intercontinental ballistic missiles (ICBMs) and submarine-launched ballistic missiles (SLBMs) each superpower could possess. By setting these ceilings, both sides sought to prevent an unchecked buildup of nuclear weapons that could escalate tensions or lead to catastrophic conflict.

What It Means in Practice

Practically, the treaty placed quantitative limits on strategic missile launchers, including a freeze on the number of ICBMs and SLBMs at existing levels. It also included provisions for the Anti-Ballistic Missile (ABM) Treaty, which restricted each side to only two ABM deployment areas to prevent the creation of missile defense systems that could undermine mutual deterrence. This balance of offensive and defensive limitations was designed to maintain strategic stability and reduce the risk of a nuclear war triggered by miscalculation or arms escalation.

Why It Matters

SALT I was the first major arms control agreement between the two Cold War adversaries and marked a significant shift from confrontation to negotiation. It demonstrated that even during periods of intense rivalry, diplomacy could be used to manage and reduce the risks posed by nuclear weapons. The treaty helped establish frameworks and verification mechanisms that would influence future arms control talks, including SALT II and the Strategic Arms Reduction Treaty (START).

Moreover, SALT I contributed to the broader policy of détente, a relaxation of tensions between the US and USSR during the 1970s. By limiting nuclear weapons, both countries aimed to reduce the possibility of accidental war and build trust, albeit cautiously.

Common Misconceptions

One common misconception is that SALT I completely halted the arms race. While it imposed limits on certain types of missiles, it did not reduce existing arsenals nor cover all categories of nuclear weapons, such as multiple independently targetable reentry vehicles (MIRVs) or tactical nuclear arms. Thus, both sides continued to develop and deploy new weapons within the treaty’s constraints.

Another misunderstanding is confusing SALT I with SALT II. SALT II, negotiated later, sought more comprehensive limits but was never ratified due to geopolitical tensions, though many of its provisions influenced later treaties.

SALT I Treaty vs SALT II Treaty

While SALT I focused on freezing the number of strategic ballistic missile launchers and limiting ABM systems, SALT II aimed to set stricter limits on the number and types of strategic nuclear delivery vehicles, including MIRVs, and introduced more detailed verification protocols. SALT II was signed in 1979 but never entered into force due to the Soviet invasion of Afghanistan and subsequent political fallout.

Real-World Example

During the early 1970s, both the US and USSR halted the deployment of new ICBMs and SLBMs as they negotiated and implemented the SALT I Treaty, marking a rare moment of cooperation amid Cold War hostility.