Diversity

the fact of many different types of things or people being included in something; a range of different things or people:

Does television adequately reflect the ethnic and cultural diversity of the country?

the fact that there are many different ideas or opinions about something:

There is a wide diversity of opinion on the question of unilateral disarmament.

the condition or fact of being different or varied; variety:

genetic/biological diversity

a wide diversity of opinion/ideas