Murgaš was active in the Slovak expatriates movement, wrote articles for their press, was one of the founders of the "Slovak League in America", actively supported the creation of the state of Czechoslovakia, organized a money collection (a fund) of American Slovaks for the creation of Czechoslovakia (US$1,000,000) and was also a writer and a signatory of the Pittsburgh Agreement (1918) between Czechs and Slovaks on establishing Czechoslovakia. As a respected personality, he gained the trust and support of the highest authorities in the US for the establishment of Czechoslovakia.