What makes Natural Resources by Martha and the Vandellas notable?

'Natural Resources' is significant for its exploration of socially conscious themes during a turbulent era in America, showcasing the group's evolution. The album included tracks like 'People Got to Be Free,' which resonated with the civil rights movement, and it highlights the Vandellas' influence on the emerging soul music scene. By the time 'Natural Resources' was released in September 1970, Martha and the Vandellas were transitioning from their earlier Motown hits to a more mature sound. This album came as the group's commercial peak was waning, following their successful singles in the 1960s. It marked a shift as they explored themes of love and social consciousness in a rapidly changing musical landscape.