Final answer:
According to the principle of sovereignty, states do not have the right to interfere in the internal affairs of other states based on their own discretion; the statement is False. Sovereignty means states have supreme authority within their territory, but international intervention may occur in exceptional cases.
Step-by-step explanation:
The principle of sovereignty dictates that states have supreme authority within their own territories and do not have the right to interfere in the internal affairs of other states unless under exceptional circumstances as recognized by international law, such as human rights violations. Thus, the statement that states have the right to interfere whenever they feel it is necessary is False.
Nations may however, under certain conditions like international human rights obligations or security threats, intervene in the affairs of other states, but these are exceptions rather than the rule of sovereignty. Sovereign rights also entail responsibilities, and when states fail to protect their citizens or commit acts against humanity, the international community may have just cause for intervention. Such interventions are ideally supported by international organizations like the United Nations to preserve legitimacy and international order.