South Sudan's boundaries were established through negotiated peace processes, making recognition straightforward. Somaliland's borders are disputed, with neighboring countries holding differing views.
South Sudan's independence followed a gradual process of negotiation and international involvement. Somaliland's declaration was unilateral, and the region has faced internal political conflicts and clan tensions.
South Sudan had backing from the U.S., African Union, and neighboring countries. Somaliland lacks significant diplomatic support on a global scale.
South Sudan's independence included a referendum and international mediation. Recognizing a breakaway region like Somaliland could set a precedent feared to encourage further territorial divisions.
International recognition prioritizes good governance and human rights. South Sudan committed to these principles; Somaliland's governance has faced scrutiny.
International recognition is complex and involves many factors beyond these five. Each case is unique.