In the 1960 decade, the world was divided into two powerful blocs – the Western powers and the Eastern powers. This divide was largely an outcome of the Cold War, which saw tension between the United States and the Soviet Union, along with their respective allies.

During this period, there were several agreements and treaties signed between the two blocs, with the aim of resolving geopolitical disputes and easing tensions. However, there was one particular agreement that was not signed by either bloc – the Comprehensive Nuclear-Test-Ban Treaty (CTBT).

The CTBT was a multilateral treaty that aimed to ban all forms of nuclear weapons testing. It was first proposed in 1954, but it took several years for it to be drafted and negotiated. The final draft was completed in 1996, but to date, not all states have ratified it.

The reason why the CTBT was not signed by the power blocs in the 1960 decade was because it simply did not exist at the time. The treaty was not finalized until much later, after years of negotiations and discussions. However, the idea of banning nuclear weapons testing was certainly a topic of debate during the 1960s.

In fact, the Partial Nuclear Test Ban Treaty (PTBT) was signed in 1963 between the United States, the Soviet Union, and the United Kingdom. This treaty banned all nuclear weapons testing in the atmosphere, underwater, and in outer space. The PTBT was an important step towards reducing nuclear tensions between the two blocs, and it marked a turning point in their relationship.

While the CTBT was not signed in the 1960 decade, it remains an important treaty for global security today. As of 2021, 184 states have signed the treaty, and 168 have ratified it. However, it still lacks ratification from key states such as China, North Korea, India, and Pakistan, which continue to possess nuclear weapons.

In conclusion, the Comprehensive Nuclear-Test-Ban Treaty was not signed by the power blocs in the 1960 decade because it did not exist at the time. However, the idea of banning nuclear weapons testing was certainly a topic of debate during the Cold War, and it led to the signing of the Partial Nuclear Test Ban Treaty. Today, the CTBT remains an important treaty for global security, but it still lacks universal ratification.