Just six months in office, Olaf Scholz hosts Sunday’s G7 summit at a time of peril for the west, as soaring inflation, an energy crisis and the threat of recession test the wealthiest economies’ ability to deploy a co-ordinated response. The Group of Seven countries must ramp up humanitarian aid to help tackle a global hunger crisis exacerbated by the war in Ukraine, a senior official of the United Nations’ food agency in Germany was quoted as saying on Saturday.