Southern gospel, old-school soul and R&B, grizzled electro-pop, and high-minded rhetoric collide in the London-via-Atlanta group Algiers. Front man Franklin James Fisher is an outspoken critic of police brutality, sexism, institutionalized racism and unfair distribution of power, both in interviews and in song. The group’s 2017 album, The Underside of Power, is an infectious and timely examination of world politics, systemic shortcomings, social injustice and anti-colonialism. Raging, blown-out anthems and an in-your-face post-punk spirit bring these concepts to life. Algiers play on Wednesday, October 25, at the Higher Ground Showcase Lounge in South Burlington.