HAVANA, Cuba: The G77+China, a group of developing and emerging countries representing 80 percent of the global population, gathers Friday in Cuba seeking to promote a "new economic world order" amid warnings of growing polarization. United Nations chief Antonio Guterres, who arrived on the island Thursday, will join some 30 heads of state and government from Africa, Asia and Latin America at the two-day summit in Havana. The meeting should conclude Saturday with a statement underscoring "the right to development in an increasingly exclusive, unfair, unjust and plundering international order," the foreign minister of host Cuba, Bruno Rodriguez, told reporters…