“A smile is the universal welcome.”
Источник: The Sense of Humor
Макс Форрестер И́стмен — американский журналист, писатель, поэт, литературный критик и радикальный политический активист. Первоначально социалист, троцкист и один из ведущих представителей Гарлемского ренессанса, под конец жизни стал антикоммунистом. Wikipedia

“A smile is the universal welcome.”
Источник: The Sense of Humor
Источник: Reflections on the Failure of Socialism (1955), p. 57
Источник: Reflections on the Failure of Socialism (1955), p. 18
Marx, Lenin and the Science of Revolution (1926), p.22
Источник: Reflections on the Failure of Socialism (1955), pp. 37-38
Источник: Reflections on the Failure of Socialism (1955), p. 29
Источник: Reflections on the Failure of Socialism (1955), p. 45
Источник: Reflections on the Failure of Socialism (1955), p. 55
Источник: Reflections on the Failure of Socialism (1955), p. 110
Источник: Reflections on the Failure of Socialism (1955), p. 110
Источник: Stalin's Russia and the Crisis in Socialism (1940), p. 82
Источник: Stalin's Russia and the Crisis in Socialism (1940), p. 149
Attributed by internet sources to Enjoyment of Poetry: With Other Essays in Aesthetics (1939), but not confirmed. <br class="br">Источник: Enjoyment of Poetry With Anthology for Enjoyment of Poetry (1951), p. 233 https://www.google.com/books/edition/_/oV5emKH2uhcC?hl=en&gbpv=1&bsq=status%20quo <br class="br">Источник: The quote appears to have been first published in the essay "The Slogan, 'Propaganda Has No Place in Art,' Is The Symptom Of A Decaying Culture" https://www.google.com/books/edition/_/WX3NyDFUC_MC?hl=en&gbpv=1&bsq=eastman, Stage Magazine (1934).