You can contribute to base society on local production (of food, energy and goods), and the local development of currency, empowerment and culture. This is relocalization. The main goals of relocalization are to increase community energy security, to strengthen local economies, and to improve environmental conditions and social equity.
The economic crisis
Many poor people could at least feed their families before their ruling elites shifted agriculture focus to export. Diminishing the opportunities of this export industry will alleviate the pressure on the peasants there.
This deglobalization cannot come from governments who instead organize widespread competition: in the West as well as in the developing countries.
Floods and famine grow. They will increase distress, displacement and death tolls -- more and more with the emissions of greenhouse gas. We must therefore contain climate change. This can be done by reducing our consumption of CO2 (and methane): fast and strong.
Take public transport (bus, train) or bike. This reduces the consumption of petroleum and biofuels (10% of pump oil in the European Union). The production of biofuels strongly destroys forests (which are carbon sinks) and small farms (who ensure food safety).
Stop eating meat. The meat industry feeds animals with GMOs (which damages the biodiversity and therefore the climate resilience). The production of food for livestock also destroys forests (which are carbon sinks) and small farms (who ensure food safety). Finally it significantly contributes to the greenhouse effect. Ask your local council to transform collective meals to organic and local #localvore. They'll answer that organic meat is too expensive, so have them scrap it on Tuesdays.
Insulate your home. This reduces the heating (which produces carbon or radioactive waste) and improve the family budget (eventually).