The Age of the Capricorn - Post-climate change, post-nuclear war, post-sea level rise, with civilization surviving in the Southern Hemisphere, mainly in the Capricorn Union, and in sealed structures in the Tropics. Set in 2121.
Quick sketch here, with the premise 'climate change sucks and we barely recover' and also 'how would people develop Antarctica as it melts'.
Grey is either inhospitable due to contamination, or because rogue military AI 'Machines' patrol the region. In some places they just sit on the land, in other places they're in a state of open war with humanity.
Blue is the Capricorn Union, a hyperpower in this world, with two-fifths of the planets population and two-thirds of the planets arable land. They also support the Republic of Ireland and the United Kingdom*, the last hold-outs of European civilization on the continent, and have the best access to Antarctica. Their founding members were Chile, Argentina, South Africa, Australia, and New Zealand, with Paraguay, Uruguay, Nigeria, and Madagascar joining as full members, most of the rest of southern Africa joining South Africa's Union (and so are not full members), and Mexico, Brazil, Sri Lanka, Thailand, the Philippines, and the Ice Sea Group (refugee state on ships, islands, and rigs around the southern oceans) closely aligned.
Yellow is the Pearl Cities League, mainly city-states and territories around the Tropics that use domes or arcologies to survive the inhospitable climate. What started with Singapore and the Persian Gulf now includes the northern portion of South America, Senegambia, Rwanda, the Somali Coast, Ethiopia, southern Yemen, northern India, and Indochina, as well as the Inner and Outer Islands (of East Asia, a refugee state on reconstructed and artificial islands in the South China Sea and south Pacific).
Green is Egypt, the worlds non-aligned power. It's on friendly terms with the Capricorns and the Pearls, it's on the front-lines with the Machines, even taking back portions of the Mediterranean coast of Europe, and it controls the major sites of three major world religions, through the semi-independent states of the Papal State for Rome, the State of Israel for Jerusalem, and the Kingdom of Hedjaz for Mecca. They do have rivals vying for control of the Sahara, a larger Lake Chad, and a greener western Sahara (not yet pictured).
The more yellow-green are non-aligned city-states, barely even united with each other, and usually on the edge of disaster due to expensive and failing climate control measures. In Iran and Afghanistan, they are more united, facing down the Machines that control Central Asia, unity is their only option.
*now with a major population center in the Falklands