That there are countries in the world that are richer than others in economic terms is not new. But where are the greatest inequalities? We invite you to discover which are the 10 borders in which there are more contrasts on both sides. Between Liechtenstein, the richest country in the world, and Burundi, the poorest, there is an obvious difference. On average, each Liechtensteinian generates a product that is 700 times greater than the one of a Burundian. But there is also a huge distance between the two: 3700 kilometers. There are cases in which there are great differences in the GDP per capita of one country and another, but not at the territorial level, since they share a border. In position 10 of our ranking is the border between Turkmenistan and Afghanistan. It extends for 800 kilometers and is in an almost desert area. Although the Turkmen are not among the richest in the world, they are considerably better off than the Afghans, at least on average and according to World Bank data, which is what we use. In fact, they are almost 15 times richer than their neighbors to the south. In position 9 we travel to Africa. The youngest country of all, South Sudan, has not gotten good economic news. It has a border with Kenya in the east that includes a disputed area. Kenyans have an income almost 18 times higher than South Sudanese. Rank 8 is for a Middle Eastern border. Israel has achieved very strong economic growth and has a wealth that is 19 times that of Lebanon. Position 7 is for a border little known to some: the one shared by Russia and North Korea. It is on the coast of the Pacific Ocean and does not reach 20 kilometers in length, making it the shortest of the 14 land limits of the Eurasian giant. There is a border crossing over the Tumen river, called the Friendship Bridge, through which trains run. The Russians are almost 20 times richer than the North Koreans. The next on the list also features North Korea, but in this case with China. And it is much more extensive, since it exceeds 1400 kilometers in length. China's tremendous economic growth over the past half century has led to a per capita GDP of more than $12,000 a year, more than 20 times that of North Koreans. At number 5 we find a border that runs in a straight line for almost its entire length. It is the one that separates Oman from Yemen in the south of the Arabian Peninsula. The only exception to the layout is this area, where the boundaries were moved so that the Habarut people would remain within Oman. While the Yemenis have been immersed in a bloody civil war for years, the Omanis have achieved some economic stability thanks to the export of oil and gas. For fourth place we return to China. In this case, the narrow border with Afghanistan, next to the Waján corridor, the same corridor that prevented the Russian and British empires from having a direct border more than a century ago. Currently, the differences between the two are enormous. Not only in wealth: each Chinese on average has an income 24 times higher than an Afghan. But also in the time zone: crossing this border we will have to change the time of the clock three and a half hours, more than anywhere else on the planet. Already on the podium of the most unequal borders in the world, we return to Yemen, where the GDP per capita does not reach 700 dollars. On the other side is one of the great oil exporting powers, Saudi Arabia, where they are 34 times richer on average. For position two we continue in the Middle East, although in a somewhat more conflictive area. The one shared by Israel and Syria in the Golan Heights, a territory that has been the scene of the Six-Day War. Israelis are 40 times richer, on average, than Syrians. Only position 1 remains in the ranking. Before revealing it, a bonus track: the most unequal borders by continent. In Europe, third place goes to Slovakia-Ukraine. Even with pre-war data, the Slovaks are four times the Ukrainians. The other two positions have Russia involved: with both Finland and Norway, one of the richest countries in the world. In Africa, third place goes to Libya and Niger. It is a border located in the middle of the Sahara desert, without any connecting road but with a small border post. Second place goes to South Africa and Mozambique. It is located on the Indian Ocean coast and has two segments, since Eswatini is in the middle. We have already seen the most unequal border in Africa, it is the one that divides Kenya from South Sudan. If we go to America, Costa Rica and Nicaragua are in third place. It is a boundary that unites two oceans, the Pacific and the Atlantic. Costa Ricans are almost six times richer, on average, than their neighbors. In second place we go further north. The border between Mexico and the United States is one of the most famous on the planet. Although there is a difference between the two, of almost seven times, it is far from being among the most unequal in the world. In fact, it ranks 31st worldwide. The most unequal border of the American continent is the one that divides Suriname from France. On average, each Franco-Guyanese has an income 9 times higher than a Surinamese. To close the bonus track we headed to Oceania. The border between Indonesia and Papua New Guinea does not seem all that uneven, but neither exceeds it in that region. It is that it is the only land limit in all of Oceania. Now yes, the first place in the entire ranking. Asia has 9 of the 10 most unequal borders in the world, including the first. South Koreans are 56 times richer than North Koreans. Both countries have totally different political regimes and economic systems Despite their common history and culture, the paths taken by both nations since they split in 1948 have been very different. On the one hand, a hermetic regime, with a cult of personality, without political freedoms and a planned economy. On the other, a democratic and capitalist system that has achieved a huge takeoff. Half a century ago both economies were even, but from then on the gap widened in this way. When thinking about the causes of the differences between the wealth of the countries, the Korean case is very special and is not replicated in the same way in the rest. Not only economic resources and productive activities can explain the ranking. There are also inherited privileges and oppressive situations that some states experienced, which caused the balance to become unbalanced. In your opinion, what other causes can influence? Leave your comment below. 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