The article is devoted to the presentation of the economic conceptions of the most influential non-Marxist (Karl Bücher, Max Weber) and neo-Marxists (Witold Kula, Immanuel Wallerstein) disclosing their analytical value in the investigations of the typologization of Lithuania's social economic history in the 16th-19th centuries (up to 1861). It is established that K. Bücher's and M. Weber's conceptions of economic development are best suited to analyze the qualitative changes in the organization

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... of the economic life of the most developed countries in Western Europe (primarily – England) rather than the socio-economic reality of the less developed countries. For the research of the latter better suited are the Marxist (W. Kula's model of the feudal economy) and the neo-Marxist (I. Wallerstein's capitalist world-system conception) concepts analyzing the economic development of less developed countries. The typological diagnosis of Lithuania's social economic history in the 16th-19th centuries (up to 1861) is presented.