 Complete the following phrase:  The leadership was usually referred to as the BrezhnevKosygin leadership, instead of the collective leadership, by First World medias. At first, there was no clear leader of the collective leadership, and Kosygin was the chief economic administrator, whereas Brezhnev was primarily responsible for the day-to-day management of the party and internal affairs. Kosygins position was later weakened when he introduced a reform in 1965 that attempted to decentralise the Soviet economy. The reform led to a backlash, with Kosygin losing supporters because many top officials took an increasingly anti-reformist stance due to the Prague Spring of 1968. As the years passed, Brezhnev was given more and more prominence, and by the 1970s he had even created a Secretariat of the General Secretary to strengthen his position within the Party. At the 