What has been ignored in practically all assessments of Margaret Thatcher's tenure, including the sober editorial in The Post {"Mrs. Thatcher Departs," Nov. 25} is her relentless assault on Britain's system of higher education and her uncompromising stance regarding the imposition of sanctions against South Africa.

Under Mrs. Thatcher's leadership, there were massive cuts in the funding of universities, many of which faced serious financial difficulties as a result. The level of morale in British universities has dropped to unprecedented degrees, and many British academics have sought greener pastures on this side of the Atlantic.

Mrs. Thatcher was also inveterate in her opposition to sanctions because, she argued, they are inherently immoral and never work. Even in the face of repeated appeals from major black political leaders in South Africa, she was unrelenting. In 1987 she stood alone against the other 48 members of the Commonwealth in opposing economic sanctions against South Africa's white minority regime.

She thankfully, but not ironically, modified her position on sanctions with regard to Iraq. Sanctions, indeed, do have a role in international politics; it is regrettable that Mrs. Thatcher seemed incapable of realizing this with regard to South Africa.

ABIODUN WILLIAMS Assistant Professor of International Relations Georgetown University Washington