Why were better roads needed after the invention of the steam engine​

After the invention of the steam engines, many transport options became available and it made its way to the road vehicles as well. The steam engines were found to provide direct rotational forces and thereby smoother rotational motion. This required better infrastructure in terms of good roads.

they all focused on themes about the inevitability of death.

earlier philosophers whose work influenced the enlightenment included bacon, descartes, locke, and spinoza. the major figures of the enlightenment included beccaria, diderot, hume, kant, montesquieu, rousseau, adam smith, and voltaire. it spread the ideas of the enlightenment across europe and beyond.