Bertrand Russell
In Praise of Idleness
I put the essay on idleness first, because it is the most challenging.
On Sales Resistance
Why I Am Not A Christian
Political Ideals
Ideas that Have Harmed Mankind
Ideas that Have Helped Mankind
Philosophy for Laymen
Power
What is the Soul
...
The Practice and Theory of Bolshevism
The above is book length, exploring the difference between socialism and Leninism.
Lenin, Trotsky, Gorky
excerpted from the previous book
Notable for Russell's characterisation of Lenin as a religious fanatic
How to Become a Man of Genius