 Frustrated with day-to-day politics, he turned to his scholarly pursuits with renewed vigour. In 1919, he briefly taught in turn at the universities of Vienna (General Economic History was an outcome of this experience) and Munich (where he gave the much-lauded lectures, Science as a Vocation and Politics as a Vocation), while compiling his scattered writings on religion in the form of massive three-volume Gesammelte Aufsätze zur Religionssoziologie [GARS hereafter]. All these reinvigorated scholarly activities came to an end in 1920 when he died suddenly of pneumonia in Munich (likely due to the Spanish flu). Max Weber was fifty-six years old.