I'd say that social justice is popular amongst (some) "liberals" , yet SLU's (Jesuit) PH school is called the College for Public Health & Social Justice.
From
http://www.llu.edu/medicine/about.page
Most medical students participate in two very popular University programs:
Social Action Community Health System and Students for International Mission Service.
Social activism sounds liberal.
But
liberal and
conservative are thrown around so much, I'm not sure what you're talking about.
From
http://en.wikipedia.org/wiki/Economic_liberalism
Economic liberalism is often associated with support for free markets and private ownership of capital goods...Economic liberalism also contrasts with protectionism because of its support for free trade and open markets. Historically, economic liberalism arose in response to mercantilism and feudalism. Today, economic liberalism is also generally considered to be opposed to non-capitalist economic orders, such as socialism, market socialism and planned economies.
Fiscal liberal/conservatism is something else, iirc
http://en.wikipedia.org/wiki/Fiscal_conservatism