original: However, when the war ended he became particularly concerned about the further development and possible use of atomic weapons and with the destruction inflicted on the world by war in general.
simplifications: When the war ended he became worried about development and possible use of atomic weapons and with the destruction that it will cause. He became concerned about the further development and possible use of atomic weapons after the war. He was also concerned with the destruction inflicted on the world by war in general. However,  when the war ended he became worried about the development and possible use of atomic weapons and with war's general destructiveness. However, when the war ended he became very worried about the further development and possible use of atomic weapons. He was also worried about the destruction by war in general. When the war ended, he became very concerned about the future of atomic weapons and how destructive war was. After the world war, he was worried about further developing atomic weapon because he thought about the destruction it caused during the war. After the war, he was very concerned about development and use of atomic weapons as well as the general destruction that war causes. After the war, he was concerned about the effect of war on the world and atomic weapons being developed and used. When the war ended, however, he became mainly concerned about the more development and possible use of nuclear weapons and the destruction inflicted on the world by war in general. However, when the war ended, he became really bothered about the further development and possible use of atomic weapons and with the destruction inflicted on the world by war in general.