Of course, Saint John XXIII called the Second Vatican Council. But he died in 1963 before the Council concluded in 1965.
Some commentators call him a reformer (today, one even mentioned revolutionary!), others claim he was on the 'left' of the Church - all predictable lazy journalistic tags.
But as Father Henry asserts, perhaps he could foresee the real reform seekers and he was attempting to anticipate them by documents like Veterum Sapientia and the calling of the Council itself.
Maybe the 'breath of fresh air' he sought for the Church was not the gust of wind that ensued in immediate post-conciliar period?