Explain in detail how miscalculations have been detrimental to individuals, communities, nations, or the world. For example, has miscalculations in a career caused a loss of life/lives, cost an organization a significant amount of money, and/or cost someone their career/livelihood, etc.? 

Explain in detail how miscalculations have been detrimental to individuals, communities, nations, or the world. For example, has miscalculations in a career caused a loss of life/lives, cost an organization a significant amount of money, and/or cost someone their career/livelihood, etc.?