Straight from Wikipedia, draw your own conclusions:
Democracy is a form of government in which power is held directly or indirectly by citizens under a free electoral system.
Republic is a state where the head of state is not a monarch”, but in which the people (or at least a part of its people) do have an impact on its government.
The plurality voting system is a single-winner voting system often used to elect executive officers or to elect members of a legislative assembly which is based on single-member constituencies.
Proportional representation (PR), sometimes referred to as full representation, is a category of electoral formulas aimed at a close match between the percentage of votes that groups of candidates (grouped by a certain measure) obtain in elections and the percentage of seats they receive (usually in legislative assemblies). PR is a democratic principle rather than an electoral system in itself. It is often contrasted to plurality voting systems, where disproportional seat distribution results from the division of voters into multiple electoral districts, especially “winner takes all” plurality (“first past the post” or FPTP) districts.
Socialism refers to a broad set of economic theories of social organization advocating public or state ownership and administration of the means of production and distribution of goods, and a society characterized by equal opportunities for all individuals, with a fair or egalitarian method of compensation.
Fascism is an authoritarian nationalist ideology focused on solving economic, political, and social problems that its supporters see as causing national decline or decadence.[1][2][3][4] Fascists aim to create a single-party state in which the government is led by a dictator who seeks unity by requiring individuals to subordinate self-interest to the collective interest of the nation or a race.
