The Canadian Law and Society Association deplores the Trump administration’s temporary ban on travel from seven majority-Muslim countries to the United States. Such arbitrary and discriminatory action poses grave consequences for people both inside and outside the United States. Scholarship and academic exchange will suffer immeasurably. The stability of bedrock constitutional principles is in question. In the spirit of free speech associated with the best of American intellectual traditions and political and constitutional ideals, we urge the Trump administration to rescind this order.