dejiny civilizácie 1 [vynechat] discoveries and inventions 1 [vynechat] emigration and immigration 1 [vynechat] emigrácia a migrácia 1 [vynechat] history of civilization 1 [vynechat] intelektuálny život 1 [vynechat] intellectual life 1 [vynechat] labor 1 [vynechat] myslenie 1 [vynechat] objavy a vynálezy 1 [vynechat] práca 1 [vynechat] racism 1 [vynechat] rasizmus 1 [vynechat] social aspects 1 [vynechat] sociálne aspekty 1 [vynechat] svetová politika 1 [vynechat] technical development 1 [vynechat] technický rozvoj 1 [vynechat] thought and thinking 1 [vynechat]