John Dugger obituary

The American artist John Dugger, who has died aged 74, engaged with the avant garde soon after arriving in London in 1967. A co-founder of the radical Artists Liberation Front and Artists for Democracy, he was an early exponent of participatory art - with his People's Participation Pavilion being constructed for Documenta 5, in Kassel in 1972 - and a pioneer of political banners, which he later said were a form of "social media before social media". Dugger produced the banner Chile Vencerà¡ ( "Chile will win") displayed on Nelson's Column in Trafalgar Square, in September 1974, for a rally…