Under Dubček's leadership, Slovakia began to evolve toward political liberalization. Because Novotný and his Stalinist predecessors had denigrated Slovak "bourgeois nationalists", most notably Gustáv Husák and Vladimír Clementis, in the 1950s, the Slovak branch worked to promote Slovak identity. This mainly took the form of celebrations and commemorations, such as the 150th birthdays of 19th century Leaders of the Slovak National Revival Ľudovít Štúr and Jozef Miloslav Hurban, the centenary of the Matica slovenská in 1963, and the twentieth anniversary of the Slovak National Uprising. At the same time, the political and intellectual climate in Slovakia became freer than that in the Czech Lands. This was exemplified by the rising readership of Kultúrny život, the weekly newspaper of the Union of Slovak Writers, which published frank discussions of liberalization, federalization and democratization, written by the most progressive or controversial Writers – both Slovak and Czech. Kultúrny život consequently became the first Slovak publication to gain a wide following among Czechs.