(personal impression, not a professional sociologist obviously :) Poland is more capitalistic/enterpreneural in spirit and they have strong nationalistic drive (the Poland state had been destroyed and Polish land&people divided between neighbors several times for pretty prolonged periods during recent several centuries, yet still the country gets back every time it gets a chance) - as 1990 in Lithuania statistics suggests nationalistic drive can be a pretty strong factor too. It was the place that revolted in 1980 against the socialism and USSR control. Lithuania are much more calmer in all respects (i have a part of extended family there). If you look at statistics by age https://en.wikipedia.org/wiki/Suicide_in_Lithuania#Statistic... - it seems to be a typical mid-life crisis in a society without active vertical mobility.