"The long-awaited global recovery is taking root," she said in an address at Harvard's Kennedy School of Government.
Countries around the globe are seeing renewed or sustained economic expansion, coinciding with greater stability in banks and market confidence, she said.
"Can the world seize the opportunity of the upswing to secure the recovery and create a more inclusive economy that works for all?" she asked.
Her remarks came the week before the IMF and World Bank are due to begin annual meetings at which the Fund will unveil updated forecasts for global growth.
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