为什么秦孝公一死，秦惠文君便把功臣商鞅杀死并灭族无姓？
推荐回答（5个）
秦惠文公杀商鞅，核心原因是为了加强皇权统治。这个事情很多人认为是因为私人恩怨，惠文公还是太子的时候曾犯法，按照新律法应该实行墨刑，可这是一种极端侮辱人格的刑罚，太子不能受就让他师傅公子虔受刑。所以太子一登基，公子虔等人便要复仇，秦惠王便杀了商鞅，这是一种说法。
商鞅变法的最大特点就是他对谁都有利，就是对世家大族，特别是老世族非常不友好，瓜分了他们的利益，这一点很好理解，取消了世袭制，以军功论爵，土地也丧失所有权，这就等于把他们的现在和未来子孙的利益都损害了，所以这些个老世族，比如公子虔、甘龙等人是一心要置商鞅于死地。
对于秦惠文王来说，他还要考虑更多。秦孝公和商鞅的关系可谓一生知己，他死后商鞅得到了土地，得到了军队，那对于现任君主来说就是一个很危险的人，商鞅在秦孝公手下是忠心耿耿，但秦惠文王不能保证他未来也是忠心耿耿，万一商鞅有不臣之心，他输不起。杀了商鞅，土地钱财军队全部都收在自己手上，才最有安全感，这是每一个君主的共识。
再看商鞅，结仇太多，秦孝公可以像巍巍青山一样护着他，而这座靠山死后，所有的矛盾都摆在明面上来了，商鞅变法还有一个特点是刑罚特别严重，比如连坐制度，比如强行父子分家等等，这也让很多百姓不满。秦惠文王上台了肯定要改革，那法律一朝一夕改不了，商鞅这个人是必须杀的，不杀不能立威，不杀不能平息各阶级怒火。
纵观战国时期的变法，只要换了领导人，变法者都没有好下场，比如吴起为魏国立下很多功劳，结果后来只能出走到楚国。
一朝君子一朝臣，古来变法者少有善终，商鞅因为秦孝公的支持所以对秦国大刀阔斧的改革，从而得罪了保守派。而秦孝公一死，秦惠文君为了安抚保守派，所以杀了商鞅。
因为当时的商鞅变法虽然让秦国的百姓得到了好处，但是当时的秦国贵族的利益受到了很大的损害，而秦惠文君无奈只得杀了他。
商鞅本身就是改革派，改革说到底就是得罪有钱人的活，所以反对他的人一直很多，没有了秦孝公的庇护，想杀他的人可以轻易除掉他。
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