Increasingly since the mid-1990s, states have imposed so-called smart sanctions, including freezing assets of governments and/or individuals and imposing commodities sanctions (oil, timber, diamonds). Targeting has involved not just “what” but also "who," as the international community has tried to affect specific individuals and rebel groups, reduce ambiguity and loopholes, and avoid the high humanitarian costs of general sanctions. With these modifications, liberal theorists continue to place special emphasis on the diplomatic, economic, and less coercive avenues of power, since they view power as multidimensional. Realist theorists believe it is necessary in exercising power to resort to or threaten to use force on a more regular basis.