Offen

I suggest that a historical political ecology can be characterized as a field-informed interpretation of society-nature relations in the past (e.g., material, ideological, legal, spiritual), how and why those relations have changed (or not changed) over time and space, and the significance of those interpretations for improving social justice and nature conservation today (Offen, 2004: 21).

— Offen, K. H. (2004). Historical political ecology: an introduction. Historical Geography 32, 19-42.

Walker

…it might be inferred that […] much of political ecology has no articulated guidelines to effect positive change; that it is largely extractive as well as ineffectual, powerless, apolitical (Walker, 2007: 366).

— Walker, P. A. (2007). Political ecology: where is the politics? Progress in Human Geography 31(3), 363-369.