In this paper, I study the economic and social network determinants of anti-establishment voting patterns in advanced democracies. More specifically, I investigate how economic shocks and social capital jointly affect voting for non-mainstream parties. As shown previously, I expect that economic downturns should favor the electoral success of anti-establishment parties (voting for populist and far-right wing parties). In order to test the effect of economic shocks I employ a novel dataset on layoffs at the regional level (the European Restructuring Dataset). On the other hand, I also expect that social capital (including both generalized trust and a higher density of social networks) should reduce the vote for anti-establishment parties. Especially so when a higher density of local social networks is associated with greater provision of local public goods. In addition, I expect an interaction between these two factors by which regional social capital should moderate the effect of economic shocks on anti-establishment parties. I develop a two-fold strategy to evaluate the empirical implications of my expectations. First, I exploit individual-survey data (ESS Rounds 1-8, ECHP and EU-SILC) aggregated at the European-region level matched with the layoffs regional data. In order to get exogenous variation in social capital measures at the European-regional level I use regional data on family types from Emmanuel Todd as an instrument. Secondly, I also develop a field-experiment in the metropolitan area of Barcelona to evaluate how economic shocks and social capital jointly affect individual voters’ levels of trust - generalized trust, institutional trust and in-group/out-group trust.