Explanation:

- Option 1: P R Q S

- Takes on account of its economic successes

- For every stride of progress any nation

- To address continuing social inequality

- It takes two back if it is unable

This option does not form a coherent sentence and lacks logical flow.

- Option 2: Q P R S

- To address continuing social inequality

- Takes on account of its economic successes

- For every stride of progress any nation

- It takes two back if it is unable

This option is illogical as it doesn't connect concepts effectively.

- Option 3: R P S Q

- For every stride of progress any nation

- Takes on account of its economic successes

- It takes two back if it is unable

- To address continuing social inequality

This option lacks coherent progression from one part to another.

- Option 4: R P Q S

- For every stride of progress any nation

- Takes on account of its economic successes

- To address continuing social inequality

- It takes two back if it is unable

This sequence logically connects ideas with a coherent flow.

Correct Answer: Option 4: R P Q S