Underground System (1992), the last album of new recordings released during Fela's lifetime, is a standout swansong. While the pace of Fela's album releases slowed during the 1980s – largely due to arrests, beatings and imprisonments – his later recording years produced some of his most important work, including Teacher Don't Teach Me Nonsense (1986), Beasts Of No Nation (1989), Overtake Don Overtake Overtake (1990) and Underground System. [Excerpt from historian Chris May]