Translate the following English sentence to French:
"Nobody can deny the fact that this presence contributed to reducing tensions and to restoring a climate, which was as conducive as possible, in such a highly sensitive context, to the free expression of the whole population' s right to vote."
Nul ne peut contester que cette présence a contribué à l'apaisement des tensions et à la restauration d'un climat aussi propice que possible, dans ce contexte délicat, à la libre expression du suffrage universel.