What does Oscar Wilde mean by his quote In modern life nothing produces such an effect as a good platitude It makes the whole world kin?

Oscar Wilde is suggesting that in modern society, cliched statements or platitudes have a unifying effect on people, allowing them to connect with each other. Despite being overused, these common truths or sayings have the power to bring people together by highlighting shared experiences or emotions. The phrase implies that in a world filled with complex ideas and differences, simple and familiar truths have the ability to create a sense of unity among individuals.