What caused the execution of Charles I?

The execution of Charles I in 1649 was primarily caused by his persistent conflicts with Parliament over issues of governance, taxation, and religion. His attempts to assert absolute monarchy led to the English Civil War, where he was ultimately defeated by Parliamentary forces. After being captured, Charles was tried for treason, found guilty, and executed, marking a significant moment in the struggle for parliamentary democracy in England. This action also reflected deep societal divisions and a growing desire for political reform.