After high school he enrolled at the University of Oxford, where he studied and graduated in geography. In 1977 she began working at the Bank of England: she remained there until 1983. A couple of years later she was an advisor for international affairs and a financial consultant for the Association for Payment Clearing Services, while from 1986 she was a Director of Borough di Merton, London.
In the 1992 elections, Theresa May he ran for North West Durham, but to no avail; five years later she was elected to Maidenhead. Already in Parliament, he became a member of the opposition for William Hague, as a shadow cabinet representative for the school, the disabled and women.
After the 2001 elections, the new Conservative leader, Iain Duncan Smith, kept her in the shadow cabinet, assigning her to the Transportation portfolio.
In July 2002, may became the first woman to lead the Conservative party: during a speech at the Conservative Party Conference, she explained why, in her view, her party should change, referring to the nickname of Nasty Party (bad, unpleasant match).
With the so-called Identity Documents Act 2010, may it suppressed the national identity card approved by Labor and revised the rules on the collection of DNA samples from suspects.
In 2012, she left the Ministry of Women and Equality, after a period of two years that saw her at the center of a great controversy, related in particular to the movements for the rights of homosexuals and the so-called LGBT community, discontented with his decision to vote against the expansion of the adoption rights of homosexual couples. However, in 2012 may He came out in favor of same-sex marriage by recording, for this purpose, a video for the Out4Marriage campaign. Theresa He thus became one of the highest profile leaders of the conservative party, favorable to homosexual unions.
In July 2013, he noted that the crime rate had dropped by more than 10% since the Conservatives were in government, despite spending cuts.
In the summer of 2016, with the Brexit referendum in which he won the option to leave the European Union, Theresa May he ran in the Conservative Party primaries, following the announcement of the resignation of Prime Minister David Cameron, who had fought for the option to remain.
A first poll conducted among Conservative MPs saw Theresa as the most voted: Andrea Leadsom, his opponent, withdrew on July 11. The statements in which he accused may being less capable by not having children, they turned on her fatally.