If Darwinism & Socialism are Intellectually Defensible so Why are Debates Involving Reasoned Dissent Not Tolerated?

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Wouldn’t you think that if darwinism and global socialism were actually on the intellectual high-ground then debates against young earth creationists and capitalistic nationalists would be eagerly sought and arranged on college campuses as often as possible? Yet the opposite is certainly true, causing everyone to wonder who in reality is on the intellectual high-ground?