Why were Marx and Engels opposed to laissez-faire?

Marx and Engels opposed laissez-faire capitalism because they believed it perpetuated class inequality and exploitation of the proletariat by the bourgeoisie. They argued that unregulated markets led to the concentration of wealth and power in the hands of a few, while the working class suffered under poor working conditions and low wages. They viewed laissez-faire as a system that prioritized profit over human welfare, which ultimately undermined social and economic justice. Instead, they advocated for a collective ownership model that would promote equality and address the needs of all members of society.