To date, the Non-Proliferation Treaty has not been signed only by India, Pakistan, Israel and South Sudan.
On July 1, 1968, an important international Treaty on the Non-Proliferation of Nuclear Weapons was signed. At the time this agreement was proposed, it was estimated that as many as 25 to 30 states would possess nuclear weapons within 20 years. The agreement was intended to prevent this.
By the Treaty on the Non-Proliferation of Nuclear Weapons, the signatory states have undertaken not to produce and / or procure nuclear weapons if they do not already have them. On the other hand, states that already had nuclear weapons at the time pledged not to give them to states that did not yet have them. Indeed, since the signing of the agreement until today, a relatively small number of new states have acquired nuclear weapons.
To date, the Non-Proliferation Treaty has not been signed only by India, Pakistan, Israel and South Sudan. North Korea, meanwhile, withdrew from the agreement in 2003. It was the first time that a signatory state withdrew from the Agreement.
The world would be significantly different today if the Treaty on the Non-Proliferation of Nuclear Weapons had not been implemented and if the prediction of 25-30 nuclear-weapon states had been realized. This would be particularly dangerous in the case of countries with unstable regimes, and in general world geostrategic policy would probably have to take a different course.