 The Brandt Report became a recognised measure for describing the general North-South divide in world economics and politics between an affluent North and a poor South.Brandt was also known for his fierce anti-communist policies at the domestic level, culminating in the "Radikalenerlass" (Anti-Radical Decree) in 1972.Brandt resigned as chancellor in 1974, after Günter Guillaume, one of his closest aides, was exposed as an agent of the Stasi, the East German secret service.