BALI — Four months after Russia invaded Ukraine, President Joko Widodo of Indonesia tried to engineer detente.
He travelled to Ukraine to meet with President Volodymyr Zelenskiy, offering to bring a message to President Vladimir Putin of Russia. Then, he flew to Russia, where he urged Mr Putin to start a dialogue with Zelenskyy.
Beneath the calls for peace, Mr Joko had another pressing issue: Russia had blocked wheat shipments and restricted the exports of fertiliser. Ukraine is…