The principle of checks and balances refers back to the separation of powers introduced by the French political theorist Montesquieu in his writings “De l’esprit des loix” in 1748. 40 years later in 1788 James Madison wrote as §51 in “The Federalists Papers” explicitly about the system of checks and balances as part of the constitution of the USA. For maintaining the principle of separation of powers it is necessary to install a system of checks and balances between the powers to prevent one power dominating the others. These well-known principles of democracy face, nevertheless, continuous challenges as to the balance of the powers (legislative, executive, judiciary). In order to safeguard democracy a basic scepticism towards the exercise of power is warranted. “In framing a government which is to be administered by men over men, the great difficulty lies in this: you must first enable the government to control the governed; and in the next place oblige it to control itself. A dependence on the people is, no doubt, the primary control on the government; but experience has taught mankind the necessity of auxiliary precautions.” (Federalist Papers, 1788, p. 239).
The necessity of auxiliary precautions has led modern democracies to a multiplicity additional checks and balances. Independent Anti-fraud offices, disciplinary committees within the separate powers as well as the checks and balances between the separate powers play a role in the survival of democracy. Recently, in July 2023 services like the internal service of the police to overlook the adequate execution of the force applied by police have been much in the headlines. Checks and balances apply to each branch of separate powers internally, and if they prove inadequate, they have to be corrected by other powers. This is the procedural as well as fundamental interaction within the separation of power. Presidential systems, where this system of checks and balances has major deficiencies, are very likely to fail its people through an overpowering executive. Neither the country of Montesquieu, nor of the Federalists is free of these dangers. Freedom of speech, freedom of movement and to meet with people, all contribute to strengthen checks and balances in a democracy. “A dependence on the people is, no doubt, the primary control of the government” (p.239). 
Violence 2023
The public debate about violence suffers from a lack of broad scientific reflection of the notion. C.A.J. Coady (1998, Vol.9 pp 615-17). In philosophy at least 2 theories address violence directly. A legitimate definition of violence treats violence as the illegitimate use of force. It is a kind of moralising appeal to reserve violence to those legally well-defined cases that receive their legitimacy from law. Next in the line of reasoning then is the definition of legitimacy. Slaves or colonies in this definition would never be allowed to use violence in their fight for freedom. This is recognised as a logical problem of such a definition. “In a legitimate state, shooting or savage beating by police will not count as violence, if it is a politically legitimate use of force.” (p.615).
The second theory of violence builds on the notion of “structural violence” (Johan Galtung, 1969). Structural violence is a much wider concept of violence. It includes social injustices inflicted on individuals or groups in society (suffering) as well as a broader view on perpetrators beyond individual persons to include police or institutions more generally. Coady stresses the point that both these theories are morally loaded without sufficient justification. Even a narrow definition of violence as “exercise of physical force” is too narrow, as it neglects the devastating effects of psychological violence. Part of the judgement therefore is motivation or intention of the person applying violence to clarify a moral stance. Psychic disorders or abuse in social upbringing are recognized as attenuating influences in legal procedures.
A wise conclusion is drawn by Coady: “Even justified violence is regrettable” (p.617). Living in permanent fear of abuse of violence by criminals or the police narrows the gap between authoritarian regimes and democracies. The basic social fabric of trust in the police is at risk in such a situation. It is very hard to re-establish trust in institutions once groups of society have lost it or even doubt that basic trust in the institutions of democracies is justified. (Image: Part of Pieter Brueghel II, De kindermoord te Bethlehem Musées royaux des beaux arts, Brussels, 16th century). 
Gewaltmonopol
Für Demokratien ist die Frage des Gewaltmonopols eine sehr entscheidende Frage. In gleichem Atemzug muss dabei die demokratische Kontrolle dieses Monopols gewährleistet sein. Verfassungsrecht in Demokratien ist darin eindeutig. Lediglich die Praxis des Rechts gestaltet sich oft schwierig und durchaus wechselhaft. Die Studie von Laila Abdul-Rahman, Hannah Espin Grau, Luise Klaus und Tobias Singelnstein (2023 bei Campus kostenlos downloadbar) greift das wichtige Thema mit einer repräsentativen Studie von 3300 Opfern polizeilicher Gewalt in Deutschland auf (Zusammenfassung). Anders als im amerikanischen Raum fehlt bei uns bisher die Berücksichtigung von Rassismus und räumlicher Verortung in der wissenschaftlichen Aufarbeitung des Geschehens. Das Interaktionsgeschehen oder Eskalationsstufen (S. 31) bieten einen weiteren Ansatzpunkt zukunftsweisend präventiv tätig zu werden. Die Aussetzung der Strafverfahren gegen Polizeibedienstete wegen Gewaltausübung (Körperverletzung) ist mit 93% aller Fälle außerordentlich hoch. Das Kapitel 8 (S. 307ff.) über die strafjustizielle Aufarbeitung offenbart die Randbedingungen der justiziellen Verfahrensweisen.
Das Gewaltmonopol darf nicht in Frage gestellt werden, aber sobald Gewalt des Monopolisten unverhältnismäßig und rechtsstaatlich ungenügend kontrolliert wird, kommt eine politische Gewaltenteilung langsam ins Wanken. Die wehrhafte Demokratie braucht Polizeigewalt, um beispielsweise das Demonstrationsrecht durchzusetzen oder öffentliche Veranstaltungen zu sichern. Aber die Exzesse polizeilicher Gewalt müssen geahndet werden. Solche Anklagen finden wir in England anlässlich der Krönungsfeier, in Frankreich bei Streiks oder Fußballspielen oder in Belgien bei Gipfeltreffen oder Räumungen von Flüchtlingslagern. Das ist keine Randnotiz. Friedlicher Protest ist wesentlicher Bestandteil von Demokratien. Einschüchterung durch Gewaltanwendung ist Teil der dunkelsten Kapitel und muss entschieden unterbunden werden im Friedensprojekt Europa. 