I need three good topic sentences for my essay Introduction. Help Please!?

What is a homeless person? A homeless person is one who lacks a fixed permanent nighttime residence, or whose nighttime residence is a temporary shelter, welfare hotel, or any public or private place not designed as sleeping accommodations for human beings. A rather deceptive definition when one considers the fact that homelessness is not a natural state, but one created and maintained by political agendas. Homelessness is not new to our nation, and it has greatly increased over the years. For growing numbers of people, work provides little, if any, protection against homelessness. Our government is not doing all that it can to combat our nation’s homelessness.