Last year, Billy Bragg celebrated his remarkable 40 years as Britain’s favorite folk singer, songwriter and campaigner. To mark this landmark, he released an acclaimed career-spanning box set, ‘The Roaring Forty,” some of which you’ll hear him perform live tonight as he brings his Roaring Forty USA Tour to Chevalier Theatre. Galvanized in the late 1970s by The Clash and an aversion to the austere policies of Margaret Thatcher, Billy set out to inspire political engagement and empathy. He has performed numerous benefit shows for the miners, the Labour party, the British Campaign for Nuclear Disarmament, the jobless, and many more, and has run the Left Field political stage at Glastonbury for the last 20 years. He has released 11 solo studio albums, three albums of Woody Guthrie lyrics set to contemporary music by Billy and Wilco (the Mermaid Avenue albums), and one album with Joe Henry. Steven Page will open. Tickets are $50 to $89 through the Chevalier Theatre website/Ticketmaster. To avoid online ordering fees, purchase tickets at the Chevalier Theatre Box Office, which is open on Fridays and Saturdays from noon to 6 p.m., as well as two hours before every Chevalier Theatre show.