Hridayananda Goswami:…. For example, when Africa was just being opened and Prabhupada went to Nairobi, he gave a special lecture in which he urged the people in a third world country not to follow the false example of so-called developed countries. He requested them to pursue development according to Krishna consciousness, appropriate and meaningful to the people of that country. For example, in America, knowing that Americans would naturally be proud of having the most important country materially, Prabhupada simultaneously praised America and pointed out its flaw by saying, “You have so many achievements, but all these achievements are like zeroes. The fine roads, the buildings, the prosperity, they are material achievements but they’re also zeroes. If you put the One of Krishna in front of the zeroes, then these achievements become real achievements.” That was Srila Prabhupada’s preaching for America.
Source: Remembrances by Sidhanta Das – Folio Vedabase