The "Second Symphony", and "Livre pour orchestre" and the "Cello Concerto" which followed, were composed during a particularly traumatic period in Lutosławski's life. His mother died in 1967, and in 1967–70 there was a great deal of unrest in Poland. This sprang first from the suppression of the theatre production "Dziady", which sparked a summer of protests; later, in 1968, the use of Polish troops to suppress the liberal reforms in Czechoslovakia's Prague Spring, and the Gdańsk Shipyards strike of 1970—which led to a violent clampdown by the authorities, both caused significant political and social tension in Poland. Lutosławski did not support the Soviet regime, and these events have been postulated as reasons for the increase in antagonistic effects in his work, particularly the "Cello Concerto" of 1968–70 for Rostropovich and the Royal Philharmonic Society. Indeed, Rostropovich's own opposition to the Soviet regime in Russia was just coming to a head (he shortly afterwards declared his support for the dissident Aleksandr Solzhenitsyn). Lutosławski himself did not hold the view that such influences had a direct effect on his music, although he acknowledged that they impinged on his creative world to some degree. In any case, the "Cello Concerto" was a great success, earning both Lutosławski and Rostropovich accolades. At the work's première with the Bournemouth Symphony Orchestra, Arthur Bliss presented Rostropovich with the Royal Philharmonic Society's gold medal.