Final answer:
Giuseppe Garibaldi's vision for the unification of Italy has come true, with the country becoming a unified state under King Victor Emmanuel II in 1861. His other political visions, including a European Confederation, were not realized in his lifetime.
Step-by-step explanation:
Out of the political visions of Giuseppe Garibaldi, the one that has come true is the unification of Italy under a monarchical government with King Victor Emmanuel II declared as the king of the unified kingdom in 1861. Despite Garibaldi's participation in creating a unified Italian state, other aspirations such as a welfare system, abolishing war, and universal healthcare were not part of the immediate outcomes during his time.
Garibaldi, a nationalist and revolutionary, played a crucial role in the unification process particularly by contributing to the incorporation of southern Italy, while Count Camillo di Cavour aligned with French forces to provoke Austria into a war that contributed to Northern Italy's unification. Nevertheless, the idea of an European Confederation as envisioned by Garibaldi did not come to fruition during his lifetime nor has it been realized in the form he might have envisioned.