Add spaces: ThekidshavebeenpickedupandhandedtheiPad.Peacereigns.

Answer: The kids have been picked up and handed the iPad. Peace reigns.

Add spaces: Thisisapieceoftheyoungman.

Answer: This is a piece of the young man.

Add spaces: WithMarxismtheproletariancriticismofcapitalismandtheworker-communistmovementandsocialoutlookwhichhademergedwiththeIndustrialRevolution,attainedimmensecoherenceclarityandtheoreticalvigour.

Answer:
With Marxism the proletarian criticism of capitalism and the worker-communist movement and social outlook which had emerged with the Industrial Revolution, attained immense coherence clarity and theoretical vigour.