This film took the top honor at the 1969 Berlin Film Festival       After a series of documentaries, this marks the directorial debut for Zelimir Zilnik       It takes a decidedly anti-Stalinist view in the wake of the 1968 Russian invasion of Czechoslovakia and raises important political questions       He states that although the world has experienced untold wars, there have only been a handful of revolutions with any lasting significance that lead to political change