the principles and practices of a conservative person or party; tendency to oppose change in institutions and methods
See conservatism in American Heritage Dictionary 4
noun
The inclination, especially in politics, to maintain the existing or traditional order.
A political philosophy or attitude emphasizing respect for traditional institutions, distrust of government activism, and opposition to sudden change in the established order.
Conservatism The principles and policies of the Conservative Party in the United Kingdom or of the Progressive Conservative Party in Canada.