The document summarizes the major concepts and theories in post-war international development over seven decades from the 1950s to present. It outlines six eras: modernity in the 1950s focused on growth models; critique in the 1960s as dependency theory emerged; hope in the 1970s; disillusionment with structural adjustment in the late 1970s-1980s; a new dawn in the post-1989 period; and an ongoing beginning from 2000 onward with new actors like BRICS countries and philanthropists playing larger roles. The document analyzes the ideas and realities of different development approaches over time from Rostow to NGOization to show how development theory and practice has evolved and become more complex.