this is a theory assignment. in preparation for writing your paper, review the main features of Liberalism, Realism, Radicalism and Constructivism, using the summary tables on pages 79, 83, 92, and 94 (Mingst text) as a point of departure for the more thorough description in the text. (You do not have to write anything from this part in your paper).Next, review chapter 2 in the Mingst text and its historical overview of world politics. Note that it is divided into historical periods: pre-Westphalia; Westphalia; nineteenth-century Europe; Interwar and World War II; The Cold War; the Immediate Post–Cold War Era; The New Millennium. For the first part of the written assignment, identify the key actors, events and dynamics that you believe each theoretical lens would highlight for each of these historical periods. Feel free to copy and paste the grid into your document. Note that the grid below is a template and you should enlarge the boxes to fit a larger amount of text in your submission (2-3 pages)Historical PeriodRealismLiberalismRadicalismConstructivismWestphalia19th Century EuropeInterwar and WWIICold WarImmediate Post-Cold WarThe New Millenniumjust an idea of how the cart should seems likeConclusions and Implications: Referring back to your completed grid, answer the following questions. You should justify and defend your answers and refer to several actual historical or current events in international politics. (2-3 pages, 1.5 spaced, 12 pt. font)What behaviour does each theory explain best?What behaviour does each theory miss?Is there a “best” theory? Why or why not?What conclusions can you draw about IR theory as it helps us to understand world politics?