Solution:Lord Bryce ⇒ The book modern Democracies written by Lord Bryce published in 1921 deals with the basic principles, characteristics and valuation of democratic government.
Graham Wallace ⇒ Wallace had argued in 'human nature in politics' that new political science should favor psychological elements such non rational behaviour.
Gabriel Almond ⇒ The comparative political system, this book is a study of specific government and grouping government.
Charles E. Merriam ⇒ In new aspects of politics, mentioned greater use of statistics and measurement.