“Asked from what country he came, he replied, "I am a citizen of the world."”

Zeno, 19.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 7: The Stoics

15
Golden Sayings of Epictetus

Diogenes Laërtius, vi. 74
Quoted by Diogenes Laërtius

Diogenes, 6.
The Lives and Opinions of Eminent Philosophers (c. 200 A.D.), Book 6: The Cynics

"When I Shall Fight," Appeal to Reason (11 September 1915) https://socialistworker.org/2004-1/500/500_06_Zinn.php

2013, Commencement Address at Ohio State University (May 2013)
Context: I don’t pretend to have all the answers. And I’m not going to offer some grand theory – not when it’s a beautiful day and you’ve got some celebrating to do. I’m not going to get partisan, either, because that’s not what citizenship is about. In fact, I am asking the same thing of you that President Bush did when he spoke at this commencement in 2002: “America needs more than taxpayers, spectators, and occasional voters,” he said. “America needs full-time citizens.”
And as graduates from a university whose motto is “Education for Citizenship,” that’s what your country expects of you. So briefly, I will ask you for two things: to participate, and to persevere.
After all, your democracy does not function without your active participation. At a bare minimum, that means voting, eagerly and often. It means knowing who’s been elected to make decisions on your behalf, what they believe in, and whether or not they deliver. If they don’t represent you the way you want, or conduct themselves the way you expect – if they put special interests above your own – you’ve got to let them know that’s not okay. And if they let you down, there’s a built-in day in November where you can really let them know that’s not okay.

This illustrates the unsatisfactory character of the First-Cause argument.
"Is There a God?" (1952)
1950s

Source: The Son of Neptune

1910s, The World Movement (1910)
Context: Each people can do justice to itself only if it does justice to others; but each people can do its part in the world movement for all only if it first does its duty within its own household. The good citizen must be a good citizen of his own country first before he can with advantage be a citizen of the world at large.