Rahul Mehta Gandhinagar LsCandidate

Questions for recallists and all.
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Armed revolution in UK 1640s extended UK democracy. Armed revolution in USA in 1770s brought democracy and best democracy world has seen till date. And armed revolution in France in 1780s , Russia in 1910s and China in 1940s didnt bring democracy.
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Question is NOT --- give reasons.
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Question is --- give differences that you think are applicable.