Are there any examples of inequality fueling social unrest in otherwise free countries? The US is frequenty touted as the least equal free country, but social u

Are there any examples of inequality fueling social unrest in otherwise free countries? The US is frequenty touted as the least equal free country, but social unrest is pretty absent. The unrest there has been (the LA riots and the fight for civil rights) was fueled by pretty blatant cases of non-financial inequality. And are walls to keep out the "poor" really a consequence of inequality?