One of the caractheristics of the postmodern thinking is Reductionism. Reductionism started before 1950's, but had its importance increased at this times. By the Reductionism we try to put the every condition observed in a phenomena in one just plane or level, with a supposed aim of better understand and manipulate the effects of that phenomena. In several situations that reduction was effecient, because in the apex of the paradigma of postmodernity the reduction solved several problems and answered questions. But, as Thomas Kuhn explained, it comes a time when the paradigma do not answer all questions more and more, and the paradigma starts to be contested. So it happened in the first decade of the 21th century.
The reductionist philosophy started a long time ago, when philosophy and science stablished the surch for "one cause and one effect". Even with the growing in complexity of the Science of the 20th century, the conclusive reasoning was a surch for some kind of reduction. But, step by step diversity imposed itself and several causes with several effects had more space in conclusions.
Its important to say that sometimes synthesis is important and usefull and it is different of reduction.
With reduction we lose, with synthesis we walk a step ahead.