As nationalism been more a force for order and cohesion than for conflict and discrimination?

A standard 1000 word essay please, with two balanced arguements for and against nationalism being a force of social cohesion.
-Harvard Referencing.
-Please use sources from:-

B. Anderson; Imagined Communities

C. Calhoun; Nationalism

A. Cobban; The Nation State and National Self-Determination

J. Dunn; Western Political Theory in the face of the future (ch.3)

A. Gamble; An introduction to Western, Social and Political (ch.5)

J. Hutchinson and AD. Smith; Nationalism

AD.Smith; Nationalism in the 20th Century

H. Kohn; The idea of Nationalism

E. Kedourie; Nationalism

E. Kamenka; Nationalism…

K. Minogue; Nationalism

Thank you