Who made the dialectical method popular?

The dialectical method was popularised by the German philosopher Georg Wilhelm Friedrich Hegel. In Hegel's philosophy, the dialectic is the process by which thought and reality are continually interacting and developing. It is a process of thesis, antithesis, and synthesis, in which a thesis is proposed, an antithesis is presented as a counter-argument, and a synthesis is then formed that reconciles the two. This process is repeated over and over again, leading to a greater and greater understanding of the truth.